CVE-2025-66939

Name: CVE-2025-66939
Creator: NVD / NIST
Published: 2026-01-12T16:16:04.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2025-66939 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Cross Site Scripting vulnerability in 66biolinks by AltumCode v.61.0.1 allows an attacker to execute arbitrary code via a crafted favicon file. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

Cross Site Scripting vulnerability in 66biolinks by AltumCode v.61.0.1 allows an attacker to execute arbitrary code via a crafted favicon file

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS Probability

0.22%

12.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Altumcode	66biolinks	61.0.1

References

https://66biolinks.com/Product
https://gist.github.com/Waqar-Arain/2a21b135a04e7804c124688ea1085875Exploit, Third Party Advisory

Timeline

Published: Jan 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-66939?

Cross Site Scripting vulnerability in 66biolinks by AltumCode v.61.0.1 allows an attacker to execute arbitrary code via a crafted favicon file

How severe is CVE-2025-66939?

CVE-2025-66939 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2025-66939?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-66939?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST