What’s Vulnerable › Vulnerabilities

CVE-2023-49802: MantisBT LinkedCustomFields Cross-site Scripting vulnerability

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-11 · updated 2026-06-17
• Weakness: CWE-79

Description

The LinkedCustomFields plugin for MantisBT allows users to link values between two custom fields, creating linked drop-downs. Prior to version 2.0.1, cross-site scripting in the MantisBT LinkedCustomFields plugin allows Javascript execution, when a crafted Custom Field is linked via the plugin and displayed when reporting a new Issue or editing an existing one. This issue is fixed in version 2.0.1. As a workaround, one may utilize MantisBT's default Content Security Policy, which blocks script execution.

Affected products

• mantisbt-plugins LinkedCustomFields: before 2.0.1 — fixed in 2.0.1

How to fix

Upgrade to a fixed version: mantisbt-plugins LinkedCustomFields 2.0.1. Check the vendor advisory for mitigations.

References

• https://github.com/mantisbt-plugins/LinkedCustomFields/commit/30e5ae751e40d7ae18bfd794fd48671477b3d286
• https://github.com/mantisbt-plugins/LinkedCustomFields/issues/10
• https://github.com/mantisbt-plugins/LinkedCustomFields/pull/11
• https://github.com/mantisbt-plugins/LinkedCustomFields/security/advisories/GHSA-2f37-9xpx-5hhw
• https://github.com/mantisbt-plugins/LinkedCustomFields/commit/30e5ae751e40d7ae18bfd794fd48671477b3d286
• https://github.com/mantisbt-plugins/LinkedCustomFields/issues/10
• https://github.com/mantisbt-plugins/LinkedCustomFields/pull/11
• https://github.com/mantisbt-plugins/LinkedCustomFields/security/advisories/GHSA-2f37-9xpx-5hhw

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