CVE-2025-42620

CSRF vulnerability in CIRCL Vulnerability-Lookup

HIGH
8.3
CVSS Score
Published: December 8, 2025 at 12:15 PM UTC
Updated: October 14, 2026 at 10:10 PM UTC
1 product affected across 1 vendorVulnerability-Lookup

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Severity
HIGH8.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0 ≤ v < 2.18.00
Affected range stops below 2.18.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.3HIGHENISA
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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