CVE-2026-45572

Decidim: HTML content blocks allow stored script execution

MEDIUM
4.8
CVSS Score
Published: August 6, 2026 at 08:10 PM UTC
Updated: September 8, 2026 at 09:09 PM UTC
1 product affected across 1 vendorDecidim

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Decidim 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.30.9v < 0.31.5v < 0.32.0
Affected range stops below 0.30.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.31.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.32.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-94

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