Stored XSS Vulnerability in Vulnerability-Lookup by ABC Corp
CVE-2025-42620

8.3HIGH

Key Information:

Vendor

Circl

Status
Vulnerability-lookup
Vendor
CVE Published:
8 December 2025

What is CVE-2025-42620?

The vulnerability in Vulnerability-Lookup arises from improper handling of user-generated content within comments and bundles. This flaw allows attackers to store malicious HTML and JavaScript within the application. When other users visit a affected profile page, the crafted payload executes in their browsers due to unsafe processing of Markdown content, leading to potentially grave security breaches. Proper sanitization and validation mechanisms are critically needed to mitigate such vulnerabilities and protect user data and sessions.

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Deploy the Patch

Affected Version(s)

Vulnerability-Lookup 0 < 2.18.0

References

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

CVSS V4

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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