What’s Vulnerable › Vulnerabilities

CVE-2021-31330

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-05-11 · updated 2026-06-17
• Weakness: CWE-79

Description

A Cross-Site Scripting (XSS) vulnerability exists within Review Board versions 3.0.20 and 4.0 RC1 and earlier. An authenticated attacker may inject malicious Javascript code when using Markdown editing within the application which remains persistent.

Affected products

• ReviewBoard Review Board: 3.0.20, 4.0-beta1, 4.0-beta2, 4.0-rc1

References

• https://mattschmidt.net/2021/04/14/review-board-xss-discovered/
• https://www.reviewboard.org/docs/releasenotes/reviewboard/3.0.21/
• https://www.reviewboard.org/docs/releasenotes/reviewboard/4.0-rc-2/
• https://www.reviewboard.org/news/2021/04/14/review-board-3-0-21-and-4-0-rc-2-security-bug-fixes-and-docker/
• https://mattschmidt.net/2021/04/14/review-board-xss-discovered/
• https://www.reviewboard.org/docs/releasenotes/reviewboard/3.0.21/
• https://www.reviewboard.org/docs/releasenotes/reviewboard/4.0-rc-2/
• https://www.reviewboard.org/news/2021/04/14/review-board-3-0-21-and-4-0-rc-2-security-bug-fixes-and-docker/

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