CVE Catalog

CVE-2026-65697

MediumCVSS 6.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.27%

19th percentile - higher than 19% of all known CVEs

Summary

Fathom Lite through 1.3.1 contains a stored XSS vulnerability in the analytics collection endpoint. Unauthenticated attackers can inject a javascript: URI into the Top Pages dashboard by supplying a crafted hostname and pathname to the /collect endpoint. The parseHostname and parsePathname functions perform no URI scheme validation, allowing the malicious link to be stored and rendered in the authenticated dashboard, enabling session hijacking and full account takeover when clicked.

Risk Assessment

An attacker can take over an operator's account when they click the malicious entry in the Top Pages dashboard, leading to session hijacking and full account takeover.

Recommendation

Upgrade Fathom Lite to a version above 1.3.1 or apply a security patch.

Related vulnerabilities

Original NVD description (English source)

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 hostname and pathname to the unauthenticated /collect endpoint. The parseHostname and parsePathname functions perform no URI scheme validation, allowing a javascript: hostname combined with a newline-prefixed pathname to be stored and later rendered as an anchor href in the authenticated dashboard without sanitization, enabling session hijacking and full account takeover when an operator clicks the poisoned entry.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS