Subrion CMS vulnerable to cross-site scripting

published 2026-02-02 9 mo ago modified 2026-06-17 4 mo ago also GHSA-9jjm-mc56-3qxv , EUVD-2025-206768

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

Multiple reflected cross-site scripting (XSS) vulnerabilities in the installation module of Subrion CMS v4.2.1 allows attackers to execute arbitrary Javascript in the context of the user's browser via injecting a crafted payload into the dbuser, dbpwd, and dbname parameters.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 9 mo ago (2026-02-03)

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/emirhanyucell/Subrion-CMS-4.2.1/blob/main/subrion-cms-exploit.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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	intelliants/subrion	<=4.2.1	no fix listed

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /emirhanyucell/Subrion-CMS-4.2.1/blob/main/subrion-cms-exploit.txt
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2025-70958
advisory
github.com /intelliants/subrion
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.

Summary