What is CVE-2025-41356?

CVE-2025-41356 is a medium-severity vulnerability in Anon Proxy Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-31.

How severe is CVE-2025-41356?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Anon Proxy Server

CVE-2025-41356

Reflected Cross-Site Scripting (XSS) vulnerability in Anon Proxy Server v0.104. This vulnerability allows an attacker to execute JavaScript code in the victim's browser by sending him/her a malicious URL. This vulnerability can be exploited to steal sensitive user data, such as session cookies, or to perform actions on behalf of the user. It affects 'host' parameter in '/diagconnect.php' endpoint.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (9.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Anon Proxy Server — versions 0.104
Anonproxyserver Anon_proxy_server — versions 0.104

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve-coordination@incibe.es (Third Party Advisory)

Frequently asked questions

What is CVE-2025-41356?: CVE-2025-41356 is a medium-severity vulnerability in Anon Proxy Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-31.
How severe is CVE-2025-41356?: Medium severity. CVSS v3 base score is 6.1 out of 10.