Vulnerability details
CVE-2026-54002
getkirby kirby
Kirby: Cross-site scripting (XSS) from incomplete HTML/XML sanitization in `Dom::sanitize()`
CVSS 4.0
8.5High
Official description
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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.5High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | 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
| Vendor | Product | Versions | Source |
|---|---|---|---|
| getkirby | kirby | < 4.9.4 | CVEProject cvelistV5 (CNA) |
| getkirby | kirby | >= 5.0.0, < 5.4.4 | CVEProject cvelistV5 (CNA) |
References and advisories
7- https://github.com/getkirby/kirby/security/advisories/GHSA-wr9h-4r83-f4v6 x_refsource_CONFIRM
- https://github.com/getkirby/kirby/commit/0f0437b5128c910103cbc78fc34d94b2a3faef4c x_refsource_MISC
- https://github.com/getkirby/kirby/commit/7ad76cf9c7387462828e6ebfc8404e31b37829e9 x_refsource_MISC
- https://github.com/getkirby/kirby/commit/9ec1873864441dbc06479ef7823da348ec7f2700 x_refsource_MISC
- https://github.com/getkirby/kirby/commit/bb2562e16c754493a403b8df84c9883108871e4c x_refsource_MISC
- https://github.com/getkirby/kirby/releases/tag/4.9.4 x_refsource_MISC
- https://github.com/getkirby/kirby/releases/tag/5.4.4 x_refsource_MISC
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Details
- Published
- 2026-07-09
- Last updated
- 2026-07-09
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.54%
Probability of exploitation in 30 days
45.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CWE-87Improper Neutralization of Alternate XSS Syntax