REDAXO allows Authenticated Reflected Cross Site Scripting - packages installation

published 2025-03-05 20 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-6167 , GHSA-8366-xmgf-334f

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits: 0; none known

REDAXO is a PHP-based CMS. In Redaxo from 5.0.0 through 5.18.2, the rex-api-result parameter is vulnerable to Reflected cross-site scripting (XSS) on the page of AddOns. This vulnerability is fixed in 5.18.3.

Patch / fix

fixed in 2

packagist redaxo/source 5.18.3
redaxo redaxo 5.18.3

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 20 mo ago (2025-03-05)

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/redaxo/redaxo/security/advisories/GHSA-8366-xmgf-334f referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	redaxo/source	>=5.0.0, <5.18.3	5.18.3

Affected products

redaxo redaxo

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /redaxo/redaxo/security/advisories/GHSA-8366-xmgf-334f
web, exploit, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2025-27412
advisory
github.com /redaxo/redaxo
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary