{"id":"CVE-2020-8439","aliases":["EUVD-2020-29306","GHSA-p533-q52w-q6fm"],"status":"published","title":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts...","description":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01589,"percentile":0.75818,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-425","CWE-862"],"published":"2020-03-07T00:26:41Z","modified":"2026-10-24T10:30:59Z","products":[{"vendor":"monstra","product":"monstra"}],"references":[{"url":"http://uploadboy.me/cn40ne6p89t6/POC.mp4.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://cert.ikiu.ac.ir/public-files/pages/attachments/11/02630f153869936d555a79f89d717f9c.pdf","tags":["x_refsource_MISC","x_transferred","Mitigation","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8439"},{"url":"https://github.com/advisories/GHSA-p533-q52w-q6fm"}],"sources":{"cve":[{"id":"CVE-2020-8439","description":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.","status":"published","published":"2020-03-07T00:26:41Z","modified":"2024-08-04T09:56:28.424Z","updated_at":"2026-11-02T14:35:50.88562Z"}],"euvd":[{"id":"EUVD-2020-29306","description":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.","status":"published","published":"2020-03-07T00:26:41Z","modified":"2024-08-04T09:56:28Z","updated_at":"2026-11-03T03:07:57.599144Z"}],"ghsa":[{"id":"GHSA-p533-q52w-q6fm","title":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts...","description":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.","status":"published","published":"2022-05-24T17:10:22Z","modified":"2023-01-29T05:01:36Z","cwes":["CWE-862"],"updated_at":"2026-11-02T14:44:52.185162Z"}],"nvd":[{"id":"CVE-2020-8439","description":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.","status":"published","published":"2020-03-07T01:15:15.457Z","modified":"2026-06-17T03:26:23.05Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-425"],"updated_at":"2026-11-02T14:05:55.32877Z"}],"osv":[{"id":"CVE-2020-8439","description":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.","status":"published","published":"2020-03-07T01:15:15.457Z","modified":"2026-10-24T10:30:59.614365281Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:17.663289Z"}]}}