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Vulnerability details: VCID-72qq-vhjg-yfgq
Vulnerability ID VCID-72qq-vhjg-yfgq
Aliases CVE-2023-34089
GHSA-5652-92r9-3fx9
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
System Score Found at
epss 0.00146 https://api.first.org/data/v1/epss?cve=CVE-2023-34089
epss 0.00146 https://api.first.org/data/v1/epss?cve=CVE-2023-34089
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-5652-92r9-3fx9
cvssv3.1 8.1 https://github.com/decidim/decidim
generic_textual HIGH https://github.com/decidim/decidim
cvssv3.1 8.1 https://github.com/decidim/decidim/releases/tag/v0.26.6
generic_textual HIGH https://github.com/decidim/decidim/releases/tag/v0.26.6
ssvc Track https://github.com/decidim/decidim/releases/tag/v0.26.6
cvssv3.1 8.1 https://github.com/decidim/decidim/releases/tag/v0.26.7
generic_textual HIGH https://github.com/decidim/decidim/releases/tag/v0.26.7
cvssv3.1 8.1 https://github.com/decidim/decidim/releases/tag/v0.27.3
generic_textual HIGH https://github.com/decidim/decidim/releases/tag/v0.27.3
ssvc Track https://github.com/decidim/decidim/releases/tag/v0.27.3
cvssv3 8.1 https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9
cvssv3.1 8.1 https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9
cvssv3.1_qr HIGH https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9
generic_textual HIGH https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9
ssvc Track https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9
cvssv3.1 8.1 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim-core/CVE-2023-34089.yml
generic_textual HIGH https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim-core/CVE-2023-34089.yml
cvssv3.1 8.1 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim/CVE-2023-34089.yml
generic_textual HIGH https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim/CVE-2023-34089.yml
cvssv3.1 8.1 https://nvd.nist.gov/vuln/detail/CVE-2023-34089
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2023-34089
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2023-34089
https://github.com/decidim/decidim
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim-core/CVE-2023-34089.yml
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim/CVE-2023-34089.yml
https://nvd.nist.gov/vuln/detail/CVE-2023-34089
GHSA-5652-92r9-3fx9 https://github.com/advisories/GHSA-5652-92r9-3fx9
GHSA-5652-92r9-3fx9 https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9
v0.26.6 https://github.com/decidim/decidim/releases/tag/v0.26.6
v0.27.3 https://github.com/decidim/decidim/releases/tag/v0.27.3
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Found at https://github.com/decidim/decidim
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Found at https://github.com/decidim/decidim/releases/tag/v0.26.6
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

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high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2024-11-04T19:43:06Z/ Found at https://github.com/decidim/decidim/releases/tag/v0.26.6
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Found at https://github.com/decidim/decidim/releases/tag/v0.26.7
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Found at https://github.com/decidim/decidim/releases/tag/v0.27.3
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2024-11-04T19:43:06Z/ Found at https://github.com/decidim/decidim/releases/tag/v0.27.3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Found at https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2024-11-04T19:43:06Z/ Found at https://github.com/decidim/decidim/security/advisories/GHSA-5652-92r9-3fx9
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim-core/CVE-2023-34089.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/decidim/CVE-2023-34089.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-34089
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.34829
EPSS Score 0.00146
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T17:26:03.963293+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2023/34xxx/CVE-2023-34089.json 38.6.0