CVE-2023-31045

4.8 mediumEPSS 0.5%

Medium (4.8) in backdropcms backdrop cms. EPSS 0.5% chance of exploitation in the next 30 days.

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."

Severity

CVSS 3.1

4.8 medium

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2023-04-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

backdropcms:backdrop_cms

References

https://github.com/backdrop/backdrop-issues/issues/6065
https://github.com/backdrop/backdrop/releases/tag/1.24.2
https://github.com/backdrop/backdrop-issues/issues/6065
https://github.com/backdrop/backdrop/releases/tag/1.24.2

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