What is CVE-2026-65697?

CVE-2026-65697 is a medium-severity vulnerability in Usefathom Fathom, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-07-23.

How severe is CVE-2026-65697?

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

XSS in Usefathom Fathom

CVE-2026-65697

Fathom Lite through 1.3.1 contains a stored cross-site scripting vulnerability in the analytics collection endpoint that allows unauthenticated attackers to inject a javascript: URI into the Top Pages dashboard by supplying a crafted hostn…

Vulnerability class: XSS (Cross-Site Scripting)

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

Usefathom Fathom — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-65697?: CVE-2026-65697 is a medium-severity vulnerability in Usefathom Fathom, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-07-23.
How severe is CVE-2026-65697?: Medium severity. CVSS v3 base score is 6.1 out of 10.