CVE-2026-39838
6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N
Summary
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows XSS Targeting Non-Script Elements.
The issue has been remediated on the master branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Wikimedia Foundation | MediaWiki - ProofreadPage Extension | 0 < 1.43 | affected |
| Wikimedia Foundation | MediaWiki - ProofreadPage Extension | 1.43 | unaffected |
| Wikimedia Foundation | MediaWiki - ProofreadPage Extension | 1.44 | unaffected |
| Wikimedia Foundation | MediaWiki - ProofreadPage Extension | 1.45 | unaffected |
Weaknesses
- CWE-79: CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: partial
References
- https://phabricator.wikimedia.org/T406088
- https://gerrit.wikimedia.org/r/q/Idd51e18479b32b7176b43ff74ca1c49d6bdd0628
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