Vulnerability Intelligence Report
REDAXO before 5.21.4 Stored XSS via Media and Link Input Widgets
CVE-2026-116900
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.
Cross-Site Scripting (XSS)
No Active Exploit Signals
CVSS Base Score
5.1
MEDIUM
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-79 ↗Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| redaxo | core | 0 < 5.21.4 (affected), 5.21.4 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Vulnerability Class
Cross-Site Scripting (XSS)
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulnCheck · Bug Bounty Provider · USA |
| Reserved | 2026-10-27T01:02:44 |
| Published | 2026-10-27T10:59:28 |
| Patch Date | 2026-08-03 |
| Last Updated | 2026-10-27T10:59:28 |
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