{"id":"CVE-2026-42562","state":"PUBLISHED","title":"Plainpad: Privilege Escalation via Writable Admin Field in Profile Update (Access Control)","description":"Plainpad is a self hosted note taking app. Prior to version 1.1.1, Plainpad allows a low-privilege authenticated user to self-escalate to administrator by submitting admin=true in PUT /api.php/v1/users/{id}. The endpoint directly persists the admin attribute from user input, and the escalated account can immediately access admin-only routes. This issue has been patched in version 1.1.1.","publishedAt":"2026-05-09T19:09:48.862Z","updatedAt":"2026-05-11T14:50:20.630Z","severity":{"score":8.3,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["alextselegidis plainpad"],"affected":[{"vendor":"alextselegidis","product":"plainpad","versions":[{"version":"< 1.1.1","status":"affected"}]}],"references":["https://github.com/alextselegidis/plainpad/security/advisories/GHSA-pvfv-wvpm-q6f6","https://github.com/alextselegidis/plainpad/issues/138","https://github.com/alextselegidis/plainpad/commit/9216a876d27b22c3d9259551636d803f7cb075fc","https://github.com/alextselegidis/plainpad/releases/tag/1.1.1"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42562.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42562","state":"PUBLISHED","datePublished":"2026-05-09T19:09:48.862Z","dateUpdated":"2026-05-11T14:50:20.630Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-28T16:56:50.192Z"},"containers":{"cna":{"title":"Plainpad: Privilege Escalation via Writable Admin Field in Profile Update (Access Control)","descriptions":[{"lang":"en","value":"Plainpad is a self hosted note taking app. Prior to version 1.1.1, Plainpad allows a low-privilege authenticated user to self-escalate to administrator by submitting admin=true in PUT /api.php/v1/users/{id}. The endpoint directly persists the admin attribute from user input, and the escalated account can immediately access admin-only routes. This issue has been patched in version 1.1.1."}],"affected":[{"vendor":"alextselegidis","product":"plainpad","versions":[{"version":"< 1.1.1","status":"affected"}]}],"references":[{"url":"https://github.com/alextselegidis/plainpad/security/advisories/GHSA-pvfv-wvpm-q6f6","name":"https://github.com/alextselegidis/plainpad/security/advisories/GHSA-pvfv-wvpm-q6f6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/alextselegidis/plainpad/issues/138","name":"https://github.com/alextselegidis/plainpad/issues/138","tags":["x_refsource_MISC"]},{"url":"https://github.com/alextselegidis/plainpad/commit/9216a876d27b22c3d9259551636d803f7cb075fc","name":"https://github.com/alextselegidis/plainpad/commit/9216a876d27b22c3d9259551636d803f7cb075fc","tags":["x_refsource_MISC"]},{"url":"https://github.com/alextselegidis/plainpad/releases/tag/1.1.1","name":"https://github.com/alextselegidis/plainpad/releases/tag/1.1.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"CWE-269: Improper Privilege Management","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-09T19:09:48.862Z"},"source":{"advisory":"GHSA-pvfv-wvpm-q6f6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-11T14:50:09.302375Z","id":"CVE-2026-42562","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-11T14:50:20.630Z"}}]}}}