Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation Parsoid. This vulnerability is associated with program files includes/parser/Sanitizer.Php, src/Core/Sanitizer.Php.
This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Wikimedia Foundation | MediaWiki | < 1.39.14, 1.43.4, 1.44.1 | 1.39.14, 1.43.4, 1.44.1 |
| Wikimedia Foundation | Parsoid | < 0.16.6, 0.20.4, 0.21.1 | 0.16.6, 0.20.4, 0.21.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mediawiki | 1:1.43.5+dfsg-1 | — |
| Debian 13 | mediawiki | 1:1.43.6+dfsg-1~deb13u1 | DSA-6085-1 |
| Debian 12 | mediawiki | 1:1.39.17-1~deb12u1 | DSA-6085-1 |
| Debian 11 | mediawiki | 1:1.35.13-1+deb11u5 | DLA-4355-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | mediawiki | No fix yet | — |
| Ubuntu 26.04 LTS | mediawiki | No fix yet | — |
| Ubuntu 25.10 | mediawiki | No fix yet | — |
| Ubuntu 18.04 LTS | mediawiki | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | mediawiki | No fix yet | — |
| Ubuntu Pro 22.04 LTS | mediawiki | No fix yet | — |
| Ubuntu Pro 20.04 LTS | mediawiki | No fix yet | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
gui-ying233/CVE-2025-61638 ★ 1 · Nov 28, 2025
CVE-2025-61638 PoC
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- WID-SEC-2025-2198 MediaWiki: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 1, 2026
- DSA-6085-1 mediawiki - security update Debian Security (DSA / DLA) · Dec 19, 2025
- DLA-4355-1 mediawiki - security update Debian Security (DSA / DLA) · Oct 31, 2025