Vulnerability Intelligence Report
REDAXO before 5.21.0 Reflected XSS via Packages API function Parameter
CVE-2026-117538
REDAXO before 5.21.0 contains a reflected cross-site scripting vulnerability in the backend packages API, where the function parameter is concatenated into an error message rendered without HTML escaping. Attackers can lure an authenticated backend user to a crafted link containing a valid CSRF token, executing JavaScript that performs same-origin actions or reads DOM data.
Cross-Site Scripting (XSS)
No Active Exploit Signals
CVSS Base Score
2.1
LOW
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 < 5.21.0 (affected), 5.21.0 (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 | 2026-10-27T10:33:39 |
| Published | 2026-10-27T10:59:32 |
| Patch Date | 2026-04-09 |
| Last Updated | 2026-10-27T10:59:32 |
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