Medium 4.1Published Oct 27, 2026

CVE-2026-117538REDAXO before 5.21.0 Reflected XSS via Packages API function Parameter

Updated under an hour ago (Oct 28, 2026, 11:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

REDAXO before 5.21.0 contains a reflected cross-site scripting vulnerability in the backend packages API, where the function parameter is concatenated into an error message rendered without HTML escaping. Attackers can lure an authenticated backend user to a crafted link containing a valid CSRF token, executing JavaScript that performs same-origin actions or reads DOM data.

CVSS: 4.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 27, 2026
First seen by InfoSec Signals: Oct 27, 2026

Affected products

Affected products

redaxo core redaxo:core (from the name)	before 5.21.0; 5.21.0 not affected	CNA record

References

References

https://github.com/redaxo/core/security/advisories/GHSA-xq4j-g85q-wf97	vendor-advisory
https://www.vulncheck.com/advisories/redaxo-before-5.21.0-reflected-xss-via-packages-api-function-parameter	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.