What’s Vulnerable › Vulnerabilities

CVE-2024-53679: Apache VCL: XSS vulnerability in User Lookup impacting user privileges

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-25 · updated 2026-06-17
• Weakness: CWE-79

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache VCL in the User Lookup form. A user with sufficient rights to be able to view this part of the site can craft a URL or be tricked in to clicking a URL that will give a specified user elevated rights. This issue affects all versions of Apache VCL through 2.5.1. Users are recommended to upgrade to version 2.5.2, which fixes the issue.

Affected products

• Apache VCL: from 2.1 before 2.5.2 — fixed in 2.5.2

How to fix

Upgrade to a fixed version: Apache VCL 2.5.2. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/bq5vs0hndt9cz9b6rpfr5on1nd4qrmyr
• http://www.openwall.com/lists/oss-security/2025/03/24/2

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