FeehiCMS Has a Remote Code Execution via Unrestricted File Upload in Ad Management

published 2025-12-02 11 mo ago modified 2026-11-04 4 d ago also GHSA-mcxq-54f4-mmx5 , EUVD-2025-200325

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

FeehiCMS version 2.1.1 has a Remote Code Execution via Unrestricted File Upload in Ad Management. FeehiCMS version 2.1.1 allows authenticated remote attackers to upload files that the server later executes (or stores in an executable location) without sufficient validation, sanitization, or execution restrictions. An authenticated remote attacker can upload a crafted PHP file and cause the application or web server to execute it, resulting in remote code execution (RCE).

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 11 mo ago (2025-12-02)

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/liufee/cms/issues/78 referenced PoC, tagged "exploit" by a source, unverified
github.com https://github.com/kiwi865/CVEs/blob/main/CVE-2025-65657.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
GitHub	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	feehi/cms	<=2.1.1	no fix listed

Classification

Weakness

CWE-77 Improper Neutralization of Special Elements used in a Command
CWE-20 Improper Input Validation

References

github.com /liufee/cms/issues/78
web, exploit, third-party-advisory
github.com /kiwi865/CVEs/blob/main/CVE-2025-65657.md
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2025-65657
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