Medium severity · published Oct 27, 2026
CVE-2026-117535
REDAXO before 5.21.3 Reflected XSS via opener_link in Media Pool
New
6.1
CVSS
–
EPSS
No
On KEV
Description
REDAXO before 5.21.3 contains a reflected cross-site scripting vulnerability in the backend media pool detail page, where the opener_link parameter is rendered without HTML escaping. Unauthenticated attackers can lure logged-in backend users with media permissions into clicking a crafted link. The injected script can then read the CSRF token and perform actions with the victim's permissions, including code execution via template or module edits when the victim is an administrator.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
core · redaxo
before 5.21.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-117535
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-117535
github.com
https://github.com/redaxo/core/security/advisories/GHSA-5293-gg47-5xmh
www.vulncheck.com
https://www.vulncheck.com/advisories/redaxo-before-5.21.3-reflected-xss-via-opener-link-in-media-pool
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