ELS for Apache Velocity: Stay Secure After EOL

Key Takeaways

• Dependencies multiply your vulnerability surface: The risk from end-of-life Velocity can extend beyond the Engine and Tools JARs to vulnerable runtime dependencies such as commons-collections 3.2.1 and, where used, Log4j 1.x.
• Rushed migrations are expensive and risky: Compressing the move from Engine 1.7 to the 2.x line under compliance deadline pressure trades security risk for new regression risk.
• Apache Velocity EOL does not have to mean the end of security: TuxCare ELS provides continued security patch coverage for end-of-life Velocity versions while you plan a controlled migration on your own schedule.

If Apache Velocity appears somewhere in your Java application’s dependency graph – and it remains common in older enterprise Java environments – its end-of-life (EOL) status is worth understanding before a security scanner or compliance audit forces the conversation.

Velocity Engine 1.7, the final release of the 1.x line, has not received a new upstream release since November 2010. Velocity Tools 2.0 has likewise received no new release since May 2010, while Apache development has continued in the Engine 2.x and Tools 3.x lines. The CVE record for both older components makes the exposure concrete, and running them in production without patch coverage carries real compliance implications.

This article explains what Apache Velocity EOL means in practice, what the security record looks like, and how TuxCare ELS for Apache Velocity gives your organization a path to staying secure without forcing a migration your teams are not ready for.

What Is Apache Velocity, and Why Is It Still So Widely Deployed?

Apache Velocity is a Java-based template engine that uses the Velocity Template Language (VTL), letting developers embed dynamic directives in plain-text templates. At runtime, the Velocity Engine merges templates with Java data models to produce rendered output. Its separation of presentation from application logic helped make Velocity a widely adopted templating option in enterprise Java applications throughout the 2000s and into the 2010s.

The Apache Velocity project includes two primary components with separate version lines and release histories:

• Velocity Engine: The core templating runtime, which handles VTL parsing, directive execution, macro expansion, and context variable resolution.
• Velocity Tools: Web framework integrations built on the Engine, including VelocityViewServlet for servlet-based applications, plus toolboxes for date formatting, URL generation, and common view-layer utilities.

Velocity was embedded deeply in Apache Struts, older Spring MVC configurations, Apache Turbine, and Java CMS platforms, often entering applications as a transitive dependency several levels deep. It also became a common choice for email template systems and report generators that are rarely modernized. That reliability can create an EOL blind spot: Velocity often remains embedded in long-lived applications precisely because it continues to work, making it easy to overlook until a vulnerability scanner identifies it.

Apache Velocity EOL: The Version Lifecycle

Apache Velocity publishes fixes through new releases, while older releases are moved to the Apache archives. Understanding the component timeline is therefore essential for evaluating risk across your stack.

Velocity Engine 1.7 was the final 1.x release and became the default Velocity version embedded in a generation of Java frameworks. The Engine 2.x line introduced breaking API changes from 1.x, and many upstream frameworks did not update their pinned Velocity dependency for years, keeping 1.7 in widespread use well into the 2020s. Velocity Tools 2.0 has likewise seen no new release since 2010; both components have been superseded by newer major versions and no longer receive releases in their respective version lines.

Apache directs users toward its current releases and archives older versions, with no published security-maintenance or patch-backport program for the Engine 1.x or Tools 2.x lines. This leaves organizations running those versions without a documented upstream source of new security fixes – precisely the gap that TuxCare ELS for Apache Velocity is built to fill.

The CVE History That Defines Apache Velocity EOL Risk

Apache Velocity EOL does not mean vulnerabilities stop being discovered in end-of-life releases; it means those releases no longer receive upstream fixes. Template engines can be high-value targets because they often process templates or data influenced by users within an application execution context. In vulnerable configurations, flaws in the boundary between template logic and the application runtime can lead to consequences as serious as remote code execution – and end-of-life status removes the upstream patch safety net against exactly this class of attack.

CVE-2020-13936: Sandbox Bypass and Remote Code Execution

CVE-2020-13936 (NVD CVSS 3.1: 8.8 High) affects Velocity Engine versions up to and including 2.2, which places the entire 1.x line within scope. An attacker who can modify Velocity templates may be able to execute arbitrary Java code or system commands with the privileges of the account running the servlet container. This server-side template injection vulnerability was reported by GitHub Security Lab as GHSL-2020-048 and subsequently addressed in advisories from multiple downstream vendors and distributions.

CVE-2020-13936 was patched in Velocity Engine 2.3, released in February 2021 – more than a decade after the final 1.x release shipped in November 2010. By the time this vulnerability was publicly disclosed in March 2021, Engine 1.7 had gone over ten years without an upstream release, and no fix was ever issued for the 1.x line.

For organizations running the end-of-life Engine 1.7, the most direct remediation options are upgrading to a fixed, supported release or applying a vendor-supplied backported patch from a provider such as TuxCare. Restricting who can upload or modify Velocity templates can reduce exposure, but such controls do not replace patching where the vulnerable functionality remains accessible.

The Hidden Risk: Velocity’s Dependency Footprint

Velocity Engine 1.7 depends on commons-collections 3.2.1 and commons-lang 2.4 for general runtime functionality; Jakarta ORO 2.0.8 is required only for certain features, such as automatic reference escaping. Log4j 1.x is an optional logging backend used only when applications configure Velocity to log via Log4j. Two components in this ecosystem carry CVSS 9.8 Critical CVEs:

commons-collections 3.2.1: CVE-2015-7501 (CVSS 9.8 Critical). This version can participate in Java deserialization gadget chains when an application deserializes untrusted data through a vulnerable code path – the same class of exploit that swept through WebSphere, JBoss, WebLogic, and Jenkins at disclosure in 2015. Velocity Engine 1.7 uses the affected version, though actual exploitability depends on how the surrounding application handles serialized objects.

Log4j 1.x: CVE-2019-17571 (CVSS 9.8 Critical). Log4j 1.x reached end of life in August 2015, and the entire 1.x branch receives no patches for subsequently disclosed CVEs. Applications that use Log4j 1.x with Velocity may be exposed to CVE-2019-17571, a remote code execution vulnerability, if they enable and expose the vulnerable SocketServer component.

Vulnerability scanners generate findings across this dependency tree that have no official upstream fix. TuxCare ELS for Apache Velocity extends coverage beyond the top-level Velocity artifacts to supported components in the transitive dependency tree.

Compliance and Regulatory Exposure

Under PCI DSS v4.0, Requirement 6.3.3 requires patches and updates for vulnerabilities classified as critical in an organization’s environment to be installed within one month of release; other applicable security updates must be installed within time frames established through the organization’s risk assessment (per Requirement 6.3.1).

Because PCI DSS does not automatically classify every CVSS 7.0-or-higher vulnerability as critical, the compliance impact of CVE-2020-13936 – public since March 2021 – depends on the organization’s documented risk ranking, exposure, and controls. Other frameworks and assurance programs, including HIPAA, SOC 2 Type II, and FedRAMP, may also require organizations to identify, assess, and address applicable vulnerabilities, though their requirements should be evaluated separately.

ELS for Apache Velocity helps organizations address applicable vulnerabilities on predictable timelines without forcing an immediate migration.

The Risks of Rushing an Apache Velocity Migration

The pressure to respond to Apache Velocity EOL findings is real. SCA tools generate findings, auditors ask pointed questions, and compliance deadlines do not move due to engineering capacity constraints. Teams that handle Apache Velocity’s end of life well treat migration as a planned engineering project, with a full template inventory, regression testing, and a defined rollback path.

What Happens When You Rush It

When teams compress the migration into an unrealistic timeline, things go sideways in predictable ways:

• Increased Support Load: Bugs not caught during compressed testing appear in production immediately. Support teams are overwhelmed with tickets about broken template rendering and changed behavior in email or report pipelines, most tracing back to VTL or API differences between Engine 1.x and 2.x that were never fully validated under the rushed timeline.
• System Instability: Some dependency API changes only manifest under production load. Intermittent template rendering failures, output formatting differences from updated Tools toolboxes, and changed VelocityViewServlet error-handling behavior all generate failures that are difficult to reproduce and expensive to diagnose.
• Accumulating Technical Debt: Configuration differences get absorbed into application initialization code rather than fixed at the library layer. VTL behavior changes between 1.x and 2.x get worked around locally in undocumented ways. The EOL problem is deferred, not resolved, and the accumulated debt makes a proper migration more costly later.
• Unplanned Costs: Emergency engineering hours, delayed feature releases, and the opportunity cost of your best engineers debugging dependency compatibility issues instead of building new capabilities typically exceed what extended lifecycle support would have cost for the entire migration planning window.

Options for Staying Secure and Compliant

Organizations running end-of-life Apache Velocity versions have three paths forward. The first two require substantial engineering work and extended timelines. The third closes the security gap quickly while your teams plan the migration properly.

Option 1: Migrate to Velocity Engine 2.4.1 and Tools 3.1

The long-term answer is to migrate to the current upstream releases – Velocity Engine 2.4.1 and Velocity Tools 3.1 as of this writing. This eliminates EOL exposure by moving to actively maintained software.

The migration has real scope: every Engine release since 2.1 (March 2019) requires Java 8 as a minimum runtime, including 2.4.1, so organizations running Velocity 1.7 on older JVM environments may need to complete a Java upgrade before migrating to any modern 2.x version. The API changes between Engine 1.7 and 2.x – removed classes, revised ResourceLoader configuration, and changed introspection and logging interfaces – may require code changes in applications that extend or configure Velocity through its Java APIs. Tools 3.1 adds further scope with package restructuring and revised servlet integration.

For enterprise applications with multiple Velocity integration points, the migration may require months of inventory, code changes, and regression testing.

Option 2: Replace Velocity With an Alternative Template Engine

Some organizations use the Apache Velocity EOL milestone as the trigger to evaluate alternatives: Thymeleaf, FreeMarker, Pebble, and Mustache are all actively maintained. Template engine replacement is more disruptive than an in-version upgrade; templates generally need to be rewritten or adapted to the new engine’s syntax, and every affected output path must be retested. It is a viable long-term goal, not a solution for an immediate Apache Velocity end-of-life compliance finding.

Option 3: Use Endless Lifecycle Support During Migration

TuxCare’s Endless Lifecycle Support (ELS) for Apache Velocity lets you stay secure without executing a migration your team is not ready for. You keep running your current Velocity version with continued security patch coverage. This is the gap ELS for Apache Velocity is designed for: the period between when official support ends and when your organization has genuinely completed a planned, controlled migration.

The Easy Solution: TuxCare ELS for Apache Velocity

TuxCare provides Endless Lifecycle Support for end-of-life Apache Velocity versions, keeping your current deployment covered with security patches delivered as drop-in JAR replacements through your existing Maven or Gradle toolchain. TuxCare has shipped more than 220,000 security patches across the open source ecosystem.

Complete Dependency Tree Coverage

TuxCare ELS for Apache Velocity extends beyond the Engine and Tools JARs to supported components in the transitive dependency footprint, including commons-collections 3.2.1 (CVE-2015-7501, CVSS 9.8 Critical) and, for applications that use it, Log4j 1.x (CVE-2019-17571, CVSS 9.8 Critical).

Refined, Automated Patching Process

TuxCare monitors the NVD, Apache security advisories, GitHub security feeds, and vendor disclosure channels around the clock. When an applicable CVE is identified, TuxCare backports the fix to supported versions using algorithmic and AI-assisted automation, with security experts validating every patch before it ships. Every update goes through integrity, functionality, and regression testing before reaching your repositories. For full technical details, see TuxCare’s Open Source Patching Process whitepaper.

Seamless Integration

Whether you consume Velocity via Maven Central or a private repository mirror, you can switch your update source to TuxCare’s secure repository with limited changes to your repository configuration. The patched JARs are designed as drop-in replacements that preserve the existing API and configuration while incorporating backported security fixes, so most teams can consume them through their existing Maven or Gradle workflows and CI/CD pipelines.

SLA-Backed Rapid Response

When new vulnerabilities are disclosed affecting supported end-of-life Velocity versions – in the Engine, in Tools, or in covered dependencies – TuxCare delivers patches backed by service-level agreements, with high- and critical-severity vulnerabilities (CVSS 7.0 and above) targeted for patching within 14 days of public disclosure.

Cost-Effective Security Continuity

The cost of TuxCare ELS is a fraction of what an emergency migration costs under compliance deadline pressure. You plan a deliberate migration to Velocity Engine 2.4.1 and Tools 3.1 when it fits your team’s capacity, including time to scope the full transitive dependency impact and validate every template output path. Or you use ELS to maintain security patch coverage and support your compliance efforts while making those decisions on your timeline.

Don’t Let Apache Velocity EOL Put Your Java Applications at Risk

Apache Velocity EOL does not mean your application is immediately compromised. It does mean that known-vulnerable components may remain in your production dependency tree – including a Velocity vulnerability rated CVSS 8.8 High and dependency vulnerabilities rated as high as CVSS 9.8 Critical – and the upstream project will not fix them.

Whether each issue is exploitable depends on your application’s configuration, data flows, and security controls, but every month that passes after a CVE disclosure against an end-of-life release is a month during which the exposure window stays open.

The right response to Apache Velocity’s end of life depends on your organization’s timeline and engineering capacity. If you can migrate to Engine 2.4.1 and Tools 3.1 now, that is the right path. If the complexity of your Velocity integration makes an immediate upgrade impractical, TuxCare ELS for Apache Velocity provides continued security patch coverage while you plan and complete the migration properly.

If Apache Velocity’s end of life is on your security radar right now, visit TuxCare’s Endless Lifecycle Support for Open Source Software to see how extended support can protect your entire open-source stack.

Summary

Article Name

ELS for Apache Velocity: Stay Secure After EOL

Description

Running EOL Apache Velocity? TuxCare ELS for Apache Velocity keeps your Java apps patched and compliant without forcing a rushed migration.

Author

Muzzammil Hasann

Publisher Name

TuxCare

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