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OpenAdvisories

Weakness (CWE)

CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine

Base Incomplete

The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.

More detail

In some cases, XSS-style attacks can work, which can obscure the root cause if the developer does not closely investigate the root cause of the error.

Template engines can be used on the server or client, so both "sides" could be affected by injection. The mechanisms of attack or the affected technologies might be different, but the mistake is fundamentally the same.

How to prevent it (2 mitigations)

  1. Architecture and Design

    Choose a template engine that offers a sandbox or restricted mode, or at least limits the power of any available expressions, function calls, or commands.

  2. Implementation

    Use the template engine's sandbox or restricted mode, if available.

Source: MITRE CWE-1336

All Critical High Medium Low Exploited only Public exploit

2 results · Clear filters · Feed

  • Medium 5.3
    CVE-2026-73858 Public exploit

    Solspace Freeform: Limited Twig template injection via submitted field values

    Solspace Freeform plugin for Craft CMS 5.x is a super flexible form-building tool. From 5.0.0 through 5.10.13, submitted values from public Freeform forms can be evaluated by the isolated Twig renderer when rendered into HTML attributes. An unauthenticated at…

    solspace craft-freeform solspace/craft-freeform Packagist
  • Medium 6.8
    CVE-2026-31864 Public exploit

    JumpServer has a Server-Side Template Injection Leading to RCE via YAML Rendering

    JumpServer is an open source bastion host and an operation and maintenance security audit system. a Server-Side Template Injection (SSTI) vulnerability exists in JumpServer's Applet and VirtualApp upload functionality. This vulnerability can only be exploited…

    jumpserver jumpserver