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
0.1%
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?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
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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