CVE-2026-23891 | Decidim up to 0.30.4/0.31.0 Name cross site scripting (GHSA-fc46-r95f-hq7g)

VDB-357197 · CVE-2026-23891 · GHSA-FC46-R95F-HQ7G DECIDIM UP TO 0.30.4/0.31.0 NAME CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.4 $0-$5k 2.19+ Summaryinfo A vulnerability, which was classified as problematic, has been found in Decidim up to 0.30.4/0.31.0. Impacted is an unknown function. The manipulation of the argument Name leads to cross site scripting. This vulnerability is uniquely identified as CVE-2026-23891. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component. Detailsinfo A vulnerability was found in Decidim up to 0.30.4/0.31.0 and classified as problematic. This issue affects an unknown functionality. The manipulation of the argument name with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is: Decidim is a participatory democracy framework. In versions below 0.30.5 and 0.31.0.rc1 through 0.31.0, a stored code execution vulnerability in the user name field allows a low-privileged attacker to execute arbitrary code in the context of any user who passively visits a comment page, resulting in high confidentiality and integrity impact across security boundaries. This issue has been fixed in versions 0.30.5 and 0.31.1. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-23891 since 01/16/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue. Upgrading to version 0.30.5 or 0.31.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Name Decidim Version 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.30 0.30.0 0.30.1 0.30.2 0.30.3 0.30.4 0.31.0 Website Product: https://github.com/decidim/decidim/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 3.5 VulDB Meta Temp Score: 3.4 VulDB Base Score: 3.5 VulDB Temp Score: 3.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Cross site scripting CWE: CWE-79 / CWE-94 / CWE-74 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Decidim 0.30.5/0.31.1 Timelineinfo 01/16/2026 CVE reserved 04/13/2026 +86 days Advisory disclosed 04/13/2026 +0 days VulDB entry created 04/13/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-fc46-r95f-hq7g Status: Confirmed CVE: CVE-2026-23891 (🔒) GCVE (CVE): GCVE-0-2026-23891 GCVE (VulDB): GCVE-100-357197 Entryinfo Created: 04/13/2026 19:43 Changes: 04/13/2026 19:43 (68) Complete: 🔍 Cache ID: 99:046:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸