CVE-2023-34089

Name: CVE-2023-34089
Creator: NVD / NIST
Published: 2023-07-11T18:15:16.17+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2023-34089 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Decidim is a participatory democracy framework, written in Ruby on Rails, originally developed for the Barcelona City government online and offline participation website. The processes filter feature is susceptible to Cross-site scripting. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

Description

Decidim is a participatory democracy framework, written in Ruby on Rails, originally developed for the Barcelona City government online and offline participation website. The processes filter feature is susceptible to Cross-site scripting. This allows a remote attacker to execute JavaScript code in the context of a currently logged-in user. An attacker could use this vulnerability to make other users endorse or support proposals they have no intention of supporting or endorsing. The problem was patched in version 0.27.3 and 0.26.7.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.58%

43.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Decidim	Decidim	< 0.26.7
Decidim	Decidim	>= 0.27.0, < 0.27.3

References

https://github.com/decidim/decidim/releases/tag/v0.26.6Release Notes
https://github.com/decidim/decidim/releases/tag/v0.27.3Release Notes
https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9Third Party Advisory
https://github.com/decidim/decidim/releases/tag/v0.26.6Release Notes
https://github.com/decidim/decidim/releases/tag/v0.27.3Release Notes
https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9Third Party Advisory

Timeline

Published: Jul 11, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-34089?

How severe is CVE-2023-34089?

CVE-2023-34089 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2023-34089?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-34089?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST