XSS in Anon Proxy Server
CVE-2025-41355
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 'port' and 'proxyPort' parameters in '/anon.php' endpoint.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (8.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Anon Proxy Server — versions 0.104
- Anonproxyserver Anon Proxy Server — versions 0.104
Weakness classification (CWE)
References
- www.incibe.es/en/incibe-cert/notices/aviso/reflected-cross-site-scripting-xss-a… (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-41355?
- CVE-2025-41355 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-2025-41355?
- Medium severity. CVSS v3 base score is 6.1 out of 10.