# CVE-2019-10909: Symfony Cross-site Scripting (XSS) vulnerability

Source: https://junglewise.ai/threats/cve-2019-10909-symfony-cross-site-scripting-xss-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2019-11-12  
License: CC BY 4.0 with a link back

CVE-2019-10909 · Severity: low · CVSS 3.1 · Published 2019-11-12

Symfony Cross-site Scripting (XSS) vulnerability

Technologies: [drupal/core (Packagist)](https://junglewise.ai/threats/technologies/packagist-drupal-core), [drupal/drupal (Packagist)](https://junglewise.ai/threats/technologies/drupal-drupal), [symfony/framework-bundle (Packagist)](https://junglewise.ai/threats/technologies/symfony-framework-bundle), [symfony/symfony (Packagist)](https://junglewise.ai/threats/technologies/symfony-symfony). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2019-10909 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-10909 being exploited in the wild.

**How severe is CVE-2019-10909?** Low severity, with a CVSS score of 3.1, published 12 November 2019.

**Which products and versions are affected?** drupal/core (Packagist) ECOSYSTEM:introduced=8.0.0,fixed=8.5.15; drupal/drupal (Packagist) ECOSYSTEM:introduced=8.0.0,fixed=8.5.15; symfony/framework-bundle (Packagist) ECOSYSTEM:introduced=2.7.0,fixed=2.7.51; symfony/symfony (Packagist) ECOSYSTEM:introduced=2.7.0,fixed=2.7.51.

**Is there a fix for CVE-2019-10909?** Yes. drupal/core (Packagist): upgrade to 8.5.15 or later; drupal/drupal (Packagist): upgrade to 8.5.15 or later; symfony/framework-bundle (Packagist): upgrade to 2.7.51 or later; symfony/symfony (Packagist): upgrade to 2.7.51 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-10909?** Check whether you run drupal/core (Packagist), drupal/drupal (Packagist), symfony/framework-bundle (Packagist) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- drupal/core (Packagist): upgrade to 8.5.15 or later

  ```sh
  composer require drupal/core:^8.5.15
  ```

- drupal/drupal (Packagist): upgrade to 8.5.15 or later

  ```sh
  composer require drupal/drupal:^8.5.15
  ```

- symfony/framework-bundle (Packagist): upgrade to 2.7.51 or later

  ```sh
  composer require symfony/framework-bundle:^2.7.51
  ```

- symfony/symfony (Packagist): upgrade to 2.7.51 or later

  ```sh
  composer require symfony/symfony:^2.7.51
  ```


## Affected products

- drupal/core (Packagist) ECOSYSTEM:introduced=8.0.0,fixed=8.5.15
- drupal/drupal (Packagist) ECOSYSTEM:introduced=8.0.0,fixed=8.5.15
- symfony/framework-bundle (Packagist) ECOSYSTEM:introduced=2.7.0,fixed=2.7.51
- symfony/symfony (Packagist) ECOSYSTEM:introduced=2.7.0,fixed=2.7.51

## Identifiers

- CVE-2019-10909
- GHSA-g996-q5r8-w7g2

## Related threats

- [Drupal core Link module cross-site scripting in markup sanitization](https://junglewise.ai/threats/cve-2026-108515-drupal-core-2026-015-the-drupal-core-link-module-provides-a)
- [Drupal Navigation module cross-site scripting in attributes](https://junglewise.ai/threats/cve-2026-108514-drupal-core-2026-016-the-navigation-module-doesn-t-sufficiently)
- [Drupal Core remote code execution in Field UI module](https://junglewise.ai/threats/cve-2026-108097-drupal-core-2026-014-a-remote-code-execution-vulnerability)
- [Symfony YAML stack exhaustion in inline lexer](https://junglewise.ai/threats/cve-2026-109413-in-symfony-yaml-prior-to-versions-5-4-54-6-4-45-7-4-18-and-8-1-6)
- [Symfony HTTP Foundation ReDoS in HeaderUtils::split()](https://junglewise.ai/threats/cve-2026-108082-symfony-is-a-php-framework-for-web-and-console-applications-and)