How severe is CVE-2025-41357?

CVE-2025-41357 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-41357 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-41357?

CVE-2025-41357 affects Anonproxyserver Anon Proxy Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-41357?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-41357 have an EU (EUVD) identifier?

Yes. CVE-2025-41357 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209141.

When was CVE-2025-41357 published?

CVE-2025-41357 was published on 2026-03-31 and last updated on 2026-06-17.

CVE-2025-41357

CVE-2025-41357 is a medium-severity vulnerability in Anonproxyserver Anon Proxy Server with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.1
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209141
Weakness: CWE-79
Affected product: Anonproxyserver Anon Proxy Server
Published: 2026-03-31
Last modified: 2026-06-17

Description

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 '/diagdns.php' endpoint.

Frequently asked questions

What is CVE-2025-41357?: 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 '/diagdns.php' endpoint.
How severe is CVE-2025-41357?: CVE-2025-41357 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-41357 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-41357?: CVE-2025-41357 affects Anonproxyserver Anon Proxy Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-41357?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-41357 have an EU (EUVD) identifier?: Yes. CVE-2025-41357 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209141.
When was CVE-2025-41357 published?: CVE-2025-41357 was published on 2026-03-31 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:anonproxyserver:anon_proxy_server:0.104:*:*:*:*:*:*:*

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CVE-2025-41356 — Medium (CVSS 6.1): Reflected Cross-Site Scripting (XSS) vulnerability in Anon Proxy Server v0.104. This vulnerability allows an attacker…
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