Medium severity · published Oct 27, 2026
CVE-2026-116900
REDAXO before 5.21.4 Stored XSS via Media and Link Input Widgets
New
5.4
CVSS
0.1%
EPSS
No
On KEV
Description
REDAXO before 5.21.4 contains a stored cross-site scripting vulnerability that allows content editors to inject HTML by storing unescaped values rendered by media, medialist, link and linklist widgets. Attackers can submit crafted REX_INPUT_MEDIA or REX_INPUT_LINK values that break out of the value attribute, executing script in administrators' backend sessions to hijack accounts.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
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 5.21.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116900
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116900
github.com
https://github.com/redaxo/core/security/advisories/GHSA-5wmj-5x79-rr87
www.vulncheck.com
https://www.vulncheck.com/advisories/redaxo-before-5.21.4-stored-xss-via-media-and-link-input-widgets
More from core
9.8
CVE-2026-117532
REDAXO Core 5.3.0 before 5.21.4 Authentication Bypass via History Plugin
8.8
CVE-2026-117536
REDAXO before 5.21.3 CSRF Token Bypass via users/users Privilege Escalation
7.5
CVE-2026-116896
REDAXO before 5.21.5 Privilege Escalation via Backup Export of Authentication Tables
7.5
CVE-2026-53599
Redaxo has a Mediapool isAllowedExtension bypass via multi-segment filename that leads to authenticated RCE on Apache mod_php multi-extension handlers
7.1
CVE-2026-116898
REDAXO before 5.21.4 Missing Authorization in Media Pool Bulk Move