Decidim: HTML content blocks allow stored script execution

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-45572
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-06 22:17:07 UTC
Updated2026-08-07 18:17:15 UTC
DescriptionDecidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, an administrator with landing-page editing privileges can store arbitrary HTML and JavaScript in an HTML content block, which Decidim::ContentBlocks::HtmlCell#html_content renders without sanitization, causing the script to execute in visitors' browsers. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Risk And Classification

Primary CVSS: v3.1 4.8 MEDIUM from [email protected]

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

EPSS: 0.001800000 probability, percentile 0.077310000 (date 2026-08-07)

Problem Types: CWE-94 | CWE-94 CWE-94: Improper Control of Generation of Code ('Code Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED4.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Decidim Decidim affected < 0.30.9 Not specified
CNA Decidim Decidim affected >= 0.31.0.rc1, < 0.31.5 Not specified
CNA Decidim Decidim affected >= 0.32.0.rc1, < 0.32.0 Not specified

References

ReferenceSourceLinkTags
github.com/decidim/decidim/pull/16451 [email protected] github.com
github.com/decidim/decidim/security/advisories/GHSA-533c-2vh9-4r86 [email protected] github.com
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