Nunjucks autoescape bypass leads to cross site scripting

Description

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.

Recommendation

Update the nunjucks package to the latest compatible version. Followings are version details:

• Affected version(s): < 3.2.4
• Patched version(s): 3.2.4

References

• GHSA-x77j-w7wf-fjmw
• bugzilla.mozilla.org
• CVE-2023-2142
• CWE-79
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• Vega Expression Language `scale` expression function Cross Site Scripting (GHSA-4vq7-882g-wcg4) - CVE-2023-26486
• Vega has Cross-site Scripting vulnerability in `lassoAppend` function (GHSA-w5m3-xh75-mp55) - CVE-2023-26487
• Vega has Cross-site Scripting vulnerability in `lassoAppend` function - CVE-2023-26487
• rsshub vulnerable to Cross-site Scripting via unvalidated URL parameters - CVE-2023-26491

Tags:

npm

nunjucks