XSS in Reviewboard Review Board
CVE-2021-31330
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.008 (55.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Reviewboard Review Board — versions 3.0.20, 4.0
Weakness classification (CWE)
References
- mattschmidt.net/2021/04/14/review-board-xss-discovered/ (Exploit, Third Party Advisory)
- www.reviewboard.org/news/2021/04/14/review-board-3-0-21-and-4-0-rc-2-security-b… (Release Notes, Vendor Advisory)
- www.reviewboard.org/docs/releasenotes/reviewboard/3.0.21/ (Release Notes, Vendor Advisory)
- www.reviewboard.org/docs/releasenotes/reviewboard/4.0-rc-2/ (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-31330?
- CVE-2021-31330 is a medium-severity vulnerability in Reviewboard Review Board, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-05-11.
- How severe is CVE-2021-31330?
- Medium severity. CVSS v3 base score is 5.4 out of 10.