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Description

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS.This issue affects Mediawiki - Cargo Extension: before 3.8.7.

PUBLISHED Reserved 2026-04-07 | Published 2026-04-07 | Updated 2026-04-07 | Assigner wikimedia-foundation




MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

Problem types

CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS)

Product status

Default status
unaffected

Any version before 3.8.7
affected

Credits

SomeRandomDeveloper finder

Yaron Koren remediation developer

References

phabricator.wikimedia.org/T416271

gerrit.wikimedia.org/...mediawiki/extensions/Cargo/+/1237957

gerrit.wikimedia.org/...mediawiki/extensions/Cargo/+/1237977

cve.org (CVE-2026-39839)

nvd.nist.gov (CVE-2026-39839)

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