TI-2026-33321 Aliases CVE-2026-45572 GHSA-533c-2vh9-4r86

Decidim: HTML content blocks allow stored script execution

LOW 22CWE-94Published 2026-08-06 · Updated 2026-08-07

Key facts

Attack vector: Network
Privileges required: High
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-94.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00251 16th percentileScored 2026-11-08

Fix Fixed decidim (decidim): 0.30.9, 0.31.5, 0.32.0decidim-core (RubyGems): 0.30.9, 0.31.5, 0.32.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
decidim	decidim	before 0.30.9; 0.31.0.rc1 to before 0.31.5; 0.32.0.rc1 to before 0.32.0	0.30.9, 0.31.5, 0.32.0	Patch available	CNA
—	decidim-core (RubyGems)	before 0.30.9	0.30.9	Patch available	GHSA-533c-2vh9-4r86
—	decidim-core (RubyGems)	0.31.0.rc1 to before 0.31.5	0.31.5	Patch available	GHSA-533c-2vh9-4r86
—	decidim-core (RubyGems)	0.32.0.rc1 to before 0.32.0	0.32.0	Patch available	GHSA-533c-2vh9-4r86

decidim Vendordecidim Affected before 0.30.9; 0.31.0.rc1 to before 0.31.5; 0.32.0.rc1 to before 0.32.0 Fixed in 0.30.9, 0.31.5, 0.32.0 Patch available CNA
decidim-core (RubyGems) Vendor— Affected before 0.30.9 Fixed in 0.30.9 Patch available GHSA-533c-2vh9-4r86
decidim-core (RubyGems) Vendor— Affected 0.31.0.rc1 to before 0.31.5 Fixed in 0.31.5 Patch available GHSA-533c-2vh9-4r86
decidim-core (RubyGems) Vendor— Affected 0.32.0.rc1 to before 0.32.0 Fixed in 0.32.0 Patch available GHSA-533c-2vh9-4r86

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:decidim:decidim::::::::	—	—	decidim

cpe:2.3:a:decidim:decidim:*:*:*:*:*:*:*:* Versions — — ·decidim

Remediation

Fix · CNA decidim (decidim) Fixed in 0.30.9, 0.31.5, 0.32.0
Fix · GHSA-533c-2vh9-4r86 decidim-core (RubyGems) Fixed in 0.30.9 Advisory →
Fix · GHSA-533c-2vh9-4r86 decidim-core (RubyGems) Fixed in 0.31.5 Advisory →
Fix · GHSA-533c-2vh9-4r86 decidim-core (RubyGems) Fixed in 0.32.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-45572
2026-10-03 Alias added: GHSA-533c-2vh9-4r86

References

Other 3

TI-2026-33169 Decidim: Verification documents can be downloaded through reusable links CVSS 3.1HIGH 7.5
TI-2025-40203 Decidim's private data exports can lead to data leaks CVSS 4.0HIGH 8.2
TI-2026-33203 Decidim: JWT-backed authentication can be replayed across organizations CVSS 3.1HIGH 8.5
TI-2026-33168 Decidim: Private exports can be downloaded through reusable links CVSS 3.1MEDIUM 6.5
TI-2026-33204 Decidim: CSV census record endpoints improper authorization CVSS 3.1MEDIUM 6.0
TI-2026-33167 Decidim: Admin user search allows SQL injection through similarity-based sorting CVSS 3.1MEDIUM 5.5

See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences