FeehiCMS is vulnerable to cross-site scripting via the id parameter of the User Update function

published 2025-12-01 11 mo ago modified 2026-11-04 4 d ago also GHSA-c2vx-rx6x-m9wj , EUVD-2025-200003

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 17%
public exploits: 0; none known

Cross Site Scripting (XSS) vulnerability in FeehiCMS 2.1.1 via the id parameter of the User Update function (?r=user%2Fupdate).

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 11 mo ago (2025-12-01)

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/liufee/cms/issues/74 referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/kiwi865/CVEs/blob/main/CVE-2025-63520.md 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	feehi/feehicms	1 listed version	no fix listed

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /liufee/cms/issues/74
web, exploit, issue-tracking, vendor-advisory
github.com /kiwi865/CVEs/blob/main/CVE-2025-63520.md
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2025-63520
advisory
github.com /liufee/cms
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