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CVE-2021-29434

Type: 
Cross-Site Scripting (XSS)
Severity: 
Low
Publication date: 
04/19/2021
Last modified: 
04/29/2021
Description
Wagtail is a Django content management system. In affected versions of Wagtail, 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. See referenced GitHub advisory for additional details, including a workaround. Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).
Impact
Access Vector: Through network
Access Complexity: Media
Authentication: Requires a single instance to exploit
Impact Type: Partially affects on system integrity + No impact on system confidentiality + No impact on system availability
Vulnerable software and versions
  • cpe:2.3:a:torchbox:wagtail:*:*:*:*:lts:*:*:*
  • cpe:2.3:a:torchbox:wagtail:*:*:*:*:-:*:*:*
  • cpe:2.3:a:torchbox:wagtail:*:*:*:*:*:*:*:*
To consult the complete list of products and versions see this page
References to Advisories, Solutions, and Tools
Explanation of fields