CVE-2025-41355 PUBLISHED

Reflected Cross-Site Scripting on Anon Proxy Server

Assigner: INCIBE
Reserved: 16.04.2025 Published: 31.03.2026 Updated: 31.03.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS Score: 5.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	Low
Attack Complexity	Low	Integrity	None	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	Anon Proxy Server
Product	Anon Proxy Server
Versions	Default: unaffected Version 0.104 is affected

Solutions

Update to the lastest versión of the software.

Credits

Rafael Pedrero finder

References

https://www.incibe.es/en/incibe-cert/notices/aviso/reflected-cross-site-scripting-xss-anon-proxy-server

Problem Types

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') CWE