{"id":"CVE-2025-5256","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-5256","generatedAt":"2026-10-27T23:58:32.629Z","title":"SummaryThis advisory addresses an Open Redirection vulnerability in Mautic's user unlocking endpoint.","description":"SummaryThis advisory addresses an Open Redirection vulnerability in Mautic's user unlocking endpoint. This vulnerability could be exploited by an attacker to redirect legitimate users to malicious websites, potentially leading to phishing attacks or the delivery of exploit kits.\n\nOpen Redirection via returnUrl Parameter: An Open Redirection vulnerability exists in the /s/action/unlock/user.user/0 endpoint. The returnUrl parameter, intended for post-action redirection, is not properly validated. This allows an attacker to craft a URL that, when clicked by a user, redirects them to an arbitrary external website controlled by the attacker.\n\nMitigationUpdate Mautic to a version that properly validates or sanitizes the returnUrl parameter to ensure that redirects only occur to trusted, internal URLs or explicitly whitelisted domains.","published":"2025-05-28T18:15:35.000Z","lastModified":"2026-06-17T09:47:33.000Z","status":"Deferred","sourceIdentifier":"security@mautic.org","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"},"cwe":["CWE-601"],"affected":[],"epss":{"score":0.00249,"percentile":0.16117,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/mautic/mautic/security/advisories/GHSA-6vx9-9r2g-8373","source":"security@mautic.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-5256","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}