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CVE-2026-54002highCWE-79CWE-87

Kirby: Cross-site scripting (XSS) from incomplete HTML/XML sanitization in `Dom::sanitize()`

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.5epss 0.4%
exploitation probability
0.4%top 66% of all CVEs
observed exploitation
nono source reports it
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites and plugins that use the writer or list fields or call Dom::sanitize(), Sane::sanitize(), Sane::Html::sanitize(), Sane::Svg::sanitize(), Sane::Xml::sanitize(), Sane::sanitizeFile(), or file sanitizeContents() with untrusted input allow malicious markup injected as children of an unknown HTML or XML tag to pass through Dom::sanitize() without being correctly sanitized, causing stored cross-site scripting. This issue is fixed in versions 4.9.4 and 5.4.4.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
getkirby · kirby
References
https://github.com/getkirby/kirby/commit/0f0437b5128c910103cbc78fc34d94b2a3faef4chttps://github.com/getkirby/kirby/commit/7ad76cf9c7387462828e6ebfc8404e31b37829e9https://github.com/getkirby/kirby/commit/9ec1873864441dbc06479ef7823da348ec7f2700https://github.com/getkirby/kirby/commit/bb2562e16c754493a403b8df84c9883108871e4chttps://github.com/getkirby/kirby/releases/tag/4.9.4https://github.com/getkirby/kirby/releases/tag/5.4.4https://github.com/getkirby/kirby/security/advisories/GHSA-wr9h-4r83-f4v6