A stored Cross-site scripting (XSS) issue in Text Editors and Formats in Backdrop CMS before 1.24.2 allows remote attackers to inject arbitrary web script or HTML via the name parameter. When a user is editing any content type (e.g., page, post, or card) as an admin, the stored XSS payload is executed upon selecting a malicious text formatting option.

NOTE: the vendor disputes the security relevance of this finding because "any administrator that can configure a text format could easily allow Full HTML anywhere."

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-31045
• backdrop/backdrop-issues#6065
• https://github.com/backdrop/backdrop/releases/tag/1.24.2