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CVE-2025-61682: Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes

high Affects mediawiki/semantic-media-wiki. Feed 2026.10.29.1, updated 2026-10-28; published .

Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes

Package
mediawiki/semantic-media-wiki Composer
Affected versions
>=3.1.0 and <7.0.0
Fixed in
7.0.0
Severity
high  CVSS 8.6
Exploitation
not on CISA KEV · EPSS 0% (34.2th percentile)
Published
2026-09-18
Source
osv.dev

References

CWE-79
NVD recordmediawiki/semantic-media-wiki advisories

Am I affected?

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# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

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