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MantisBT XSS through weak CSP when using Gravatar plugin

Moderate severity GitHub Reviewed Published May 17, 2022 to the GitHub Advisory Database • Updated Jun 11, 2025

Package

composer mantisbt/mantisbt (Composer)

Affected versions

<= 1.3.0
= 2.0.0-beta.1

Patched versions

1.3.1
2.0.0-beta.2

Description

MantisBT before 1.3.1 and 2.x before 2.0.0-beta.2 uses a weak Content Security Policy when using the Gravatar plugin, which allows remote attackers to conduct cross-site scripting (XSS) attacks via unspecified vectors.

References

Published by the National Vulnerability Database Feb 17, 2017
Published to the GitHub Advisory Database May 17, 2022
Reviewed Jun 11, 2025
Last updated Jun 11, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(55th percentile)

Weaknesses

CVE ID

CVE-2016-7111

GHSA ID

GHSA-8vx9-hcvq-gfv8

Source code

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