{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23891","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-01-16T21:02:02.902Z","datePublished":"2026-04-13T16:52:16.448Z","dateUpdated":"2026-04-14T16:29:24.311Z"},"containers":{"cna":{"title":"Decidim has a Cross-site scripting (XSS) vulnerability via user name field","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"LOW","baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L","version":"4.0"}}],"references":[{"name":"https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g"},{"name":"https://github.com/decidim/decidim/releases/tag/v0.30.5","tags":["x_refsource_MISC"],"url":"https://github.com/decidim/decidim/releases/tag/v0.30.5"},{"name":"https://github.com/decidim/decidim/releases/tag/v0.31.1","tags":["x_refsource_MISC"],"url":"https://github.com/decidim/decidim/releases/tag/v0.31.1"}],"affected":[{"vendor":"decidim","product":"decidim","versions":[{"version":">= 0.31.0.rc1, < 0.31.1","status":"affected"},{"version":"< 0.30.5","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-13T16:52:16.448Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-fc46-r95f-hq7g","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-14T15:23:47.437196Z","id":"CVE-2026-23891","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-14T16:29:24.311Z"}}]}}