High severity · published Oct 27, 2026
CVE-2026-117536
REDAXO before 5.21.3 CSRF Token Bypass via users/users Privilege Escalation
New
8.8
CVSS
–
EPSS
No
On KEV
Description
REDAXO before 5.21.3 contains a cross-site request forgery vulnerability in the backend user administration page (users/users) because the CSRF token check only runs when the save parameter is set, while the update path triggered by FUNC_UPDATE does not require it. Attackers can lure a logged-in backend user with the users[] permission to a crafted GET link to grant administrator rights, deactivate accounts, or lock out the sole administrator.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
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-2026-117536
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-117536
github.com
https://github.com/redaxo/core/security/advisories/GHSA-mrrj-4f5x-j958
www.vulncheck.com
https://www.vulncheck.com/advisories/redaxo-before-5.21.3-csrf-token-bypass-via-users-users-privilege-escalation
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