PiranhaCMS stored XSS

published 2025-09-26 13 mo ago modified 2026-11-05 3 d ago also GHSA-456v-f425-8mcv , EUVD-2025-31385

cvss: 6.8; 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 25%
public exploits: 0; none known

PiranhaCMS 12.0 allows stored XSS in the Text content block of Standard and Standard Archive Pages via /manager/pages, enabling execution of arbitrary JavaScript in another user s browser.

Patch / fix

links 1

github.com/PiranhaCMS/piranha.core/releases/tag/v12.0 release

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 13 mo ago (2025-09-26)

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/Saconyfx/security-advisories/blob/main/CVE-2025-57692/advisory.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
CNA	3.1	6.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
GitHub	3.1	6.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
nuget	Piranha	<=12.0	no fix listed

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /Saconyfx/security-advisories/blob/main/CVE-2025-57692/advisory.md
web, exploit, third-party-advisory
github.com /PiranhaCMS/piranha.core/releases/tag/v12.0
web, release-notes
nvd.nist.gov /vuln/detail/CVE-2025-57692
advisory
github.com /PiranhaCMS/piranha.core
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