CVE-2026-45572Network attack vectorHinoki check available

Stored script execution via unsanitized HTML blocks

Published Aug 6, 2026 · Updated Aug 6, 2026

Stored XSS in Decidim before 0.30.9, 0.31.0.rc1 through 0.31.4, and 0.32.0.rc1 allows remote authenticated users to execute scripts. Decidim::ContentBlocks::HtmlCell#html_content marks stored HTML-block content as safe without sanitization or output escaping. Landing-page editing privileges are required, and the persisted code runs when visitors open the affected public page.

CVSS severity4.8
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in Decidim before 0.30.9, 0.31.0.rc1 through 0.31.4, and 0.32.0.rc1 allows remote authenticated users to execute scripts. Decidim::ContentBlocks::HtmlCell#html_content marks stored HTML-block content as safe without sanitization or output escaping. Landing-page editing privileges are required, and the persisted code runs when visitors open the affected public page.

The record

CVE
CVE-2026-45572
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Decidim
Product
Decidim
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.30.9
  2. Affected versionversion=>= 0.31.0.rc1, < 0.31.5
  3. Affected versionversion=>= 0.32.0.rc1, < 0.32.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Decidim · Decidimversion=< 0.30.9; version=>= 0.31.0.rc1, < 0.31.5; version=>= 0.32.0.rc1, < 0.32.0

Published CVSS scores

4.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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