CVE-2023-32693Public exploitNetwork attack vector

Logged-in user action via newline-smuggled JavaScript URL

Published Jul 11, 2023 · Updated Nov 4, 2024

Reflected XSS in Decidim 0.25.0 through 0.26.6 and 0.27.0 through 0.27.2 allows remote attackers to act as logged-in users. LinksController applies Ruby multiline line anchors to the external_url GET parameter, so an encoded newline lets a JavaScript URL pass validation and reach link_to. Execution requires a logged-in user to open the crafted link and click Proceed; the script can read the page's CSRF token and submit endorsements or votes in that user's session.

CVSS severity8.1
High
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Decidim 0.25.0 through 0.26.6 and 0.27.0 through 0.27.2 allows remote attackers to act as logged-in users. LinksController applies Ruby multiline line anchors to the external_url GET parameter, so an encoded newline lets a JavaScript URL pass validation and reach link_to. Execution requires a logged-in user to open the crafted link and click Proceed; the script can read the page's CSRF token and submit endorsements or votes in that user's session.

The record

CVE
CVE-2023-32693
Published
Jul 11, 2023
Updated
Nov 4, 2024
Vendor
Decidim
Product
Decidim
Classifications
CWE-79, T1204.001, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2024Record 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=>= 0.25.0, < 0.26.7
  2. Affected versionversion=0.25.0 <0.26.7
  3. Affected versionversion=>= 0.27.0, < 0.27.3
  4. Affected versionversion=0.27.0 <0.27.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Decidim · Decidimversion=>= 0.25.0, < 0.26.7; version=0.25.0 <0.26.7; version=>= 0.27.0, < 0.27.3; version=0.27.0 <0.27.3

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link
T1566.002Spearphishing Link

Public exploit references

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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