XSS in Mozilla Nunjucks
CVE-2023-2142
In Nunjucks versions prior to version 3.2.4, it was possible to bypass the restrictions which are provided by the autoescape functionality. If there are two user-controlled parameters on the same line used in the views, it was possible to inject cross site scripting payloads using the backslash \ character.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Mozilla Nunjucks — versions 0
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, issue-tracking, Issue Tracking)
- github.com/mozilla/nunjucks/security/advisories/GHSA-x77j-w7wf-fjmw (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-2142?
- CVE-2023-2142 is a medium-severity vulnerability in Mozilla Nunjucks, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2024-11-26.
- How severe is CVE-2023-2142?
- Medium severity. CVSS v3 base score is 6.1 out of 10.