{"id":"CVE-2025-10493","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-10493","generatedAt":"2026-10-28T00:20:17.841Z","title":"The Chained Quiz plugin for WordPress is vulnerable to Insecure Direct Object Reference in version 1.3.4 and below via the quiz submission and completion mechanisms due to missing validation on a user controlled key.","description":"The Chained Quiz plugin for WordPress is vulnerable to Insecure Direct Object Reference in version 1.3.4 and below via the quiz submission and completion mechanisms due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to hijack and modify other users' quiz attempts by manipulating the chained_completion_id cookie value, allowing them to alter quiz answers, scores, and results of any user. The vulnerability was partially patched in versions 1.3.4 and 1.3.5.","published":"2025-09-18T07:15:59.000Z","lastModified":"2026-06-17T08:28:26.000Z","status":"Deferred","sourceIdentifier":"security@wordfence.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-639"],"affected":[],"epss":{"score":0.00916,"percentile":0.59922,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2025-12-25","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":52464,"kind":"exploit","title":"Chained Quiz  1.3.5 - Unauthenticated Insecure Direct Object Reference via Cookie","url":"https://www.exploit-db.com/exploits/52464","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/52464.txt","file":"exploits/multiple/webapps/52464.txt","published":"2025-12-25","added":"2025-12-25","updated":"2025-12-25","author":"0xsabre","type":"webapps","platform":"multiple","port":null,"verified":false,"codes":["CVE-2025-10493"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"high","text":"A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 0.9%. Treat it as high on anything reachable from the internet."},"changes":[],"references":[{"url":"https://plugins.trac.wordpress.org/browser/chained-quiz/tags/1.3.3/controllers/quizzes.php","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/chained-quiz/tags/1.3.3/models/quiz.php","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset/3362561/","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset/3362701/","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset/3362966/","source":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/1d8f6965-1fe3-4f24-bd6b-9026e91bc5db?source=cve","source":"security@wordfence.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-10493","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."}