CVE-2021-29434: Improper validation of URLs ('Cross-site Scripting') in Wagtail rich text fields
(updated )
When saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with javascript: URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin.
References
- github.com/advisories/GHSA-wq5h-f9p5-q7fx
- github.com/pypa/advisory-database/tree/main/vulns/wagtail/PYSEC-2021-114.yaml
- github.com/wagtail/wagtail
- github.com/wagtail/wagtail/commit/5c7a60977cba478f6a35390ba98cffc2bd41c8a4
- github.com/wagtail/wagtail/commit/915f6ed2bd7d53154103cc4424a0f18695cdad6c
- github.com/wagtail/wagtail/compare/v2.11.6...v2.11.7
- github.com/wagtail/wagtail/security/advisories/GHSA-wq5h-f9p5-q7fx
- nvd.nist.gov/vuln/detail/CVE-2021-29434
- pypi.org/project/wagtail
Code Behaviors & Features
Detect and mitigate CVE-2021-29434 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →