Vulnerability · Published Dec 8, 2025 · Assigned by ENISA

CVE-2025-42620CSRF vulnerability in CIRCL Vulnerability-Lookup

High 8.3

In plain English

A high-severity cross-site scripting in Vulnerability-Lookup from CIRCL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 4.0)8.3High

Exploit odds (30 days)0.3%top 78.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

In affected versions, vulnerability-lookup handled user-controlled content in comments and bundles in an unsafe way, which could lead to stored Cross-Site Scripting (XSS). On the backend, the related_vulnerabilities field of bundles accepted arbitrary strings without format validation or proper sanitization. On the frontend, comment and bundle descriptions were converted from Markdown to HTML and then injected directly into the DOM using string templates and innerHTML. This combination allowed an attacker who could create or edit comments or bundles to store crafted HTML/JavaScript payloads which would later be rendered and executed in the browser of any user visiting the affected profile page (user.html). This issue affects Vulnerability-Lookup: before 2.18.0.

Affected products (as reported)

Vendor	Product	Versions
CIRCL	Vulnerability-Lookup	0 – before 2.18.0

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

References

https://vulnerability.circl.lu/vuln/gcve-1-2025-0035 vendor-advisory