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CVE-2026-45572— Decidim: HTML content blocks allow stored script execution

Quick assessment

Affected
decidim decidim
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Decidim是Decidim组织开源的一个参与式民主框架,用 Ruby on Rails 编写。 Decidim 0.30.9之前版本、0.31.0至0.31.5之前版本和0.32.0.rc1至0.32.0.rc2之前版本存在代码注入漏洞，该漏洞源于未对HTML内容块中的任意HTML和JavaScript进行清理，可能导致存储型跨站脚本攻击。

CVSS 4.8 · Medium EPSS 0.25% · P15

Affected Version Matrix 3

VendorProduct Version RangeStatus
decidim decidim < 0.30.9 affected
>= 0.31.0.rc1, < 0.31.5 affected
>= 0.32.0.rc1, < 0.32.0 affected
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I. Basic Information for CVE-2026-45572

Vulnerability Information
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Vulnerability Title
Decidim: HTML content blocks allow stored script execution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Decidim 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Decidim是Decidim组织开源的一个参与式民主框架,用 Ruby on Rails 编写。 Decidim 0.30.9之前版本、0.31.0至0.31.5之前版本和0.32.0.rc1至0.32.0.rc2之前版本存在代码注入漏洞，该漏洞源于未对HTML内容块中的任意HTML和JavaScript进行清理，可能导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
decidim decidim < 0.30.9 -

II. Public POCs for CVE-2026-45572

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III. Intelligence Information for CVE-2026-45572

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Patches & Fixes for CVE-2026-45572 (1)

Vendor Advisories for CVE-2026-45572 (1)

Same Patch Batch · decidim · 2026-08-06 · 5 CVEs total

CVE-2026-45414 8.5 HIGH Decidim: JWT-backed authentication can be replayed across organizations
CVE-2026-45378 7.5 HIGH Decidim: Verification documents can be downloaded through reusable links
CVE-2026-45573 6.4 MEDIUM Decidim: Push subscriptions can be abused for server-side requests
CVE-2026-45415 6.0 MEDIUM Decidim: CSV census record endpoints improper authorization

IV. Related Vulnerabilities

Same product: decidim
Same vendor: decidim
Same weakness: CWE-94

V. Comments for CVE-2026-45572

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