{"id":"CVE-2020-12471","aliases":["EUVD-2020-4777","GHSA-f842-vw35-9x42"],"status":"published","title":"MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages...","description":"MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages/SocialNetworking/lng/en-US/PhotoGallery.aspx because of deserialization in ModuleGallery.HTML5Upload, ModuleGallery.SilverLightUploadModule, HTML5Upload, and SilverLightUploadHandler.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.02764,"percentile":0.86494,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2020-04-29T19:58:15Z","modified":"2026-06-17T02:51:52Z","products":[{"vendor":"mono","product":"monox"}],"references":[{"url":"https://github.com/belong2yourself/vulnerabilities/tree/master/MonoX%20CMS/Remote%20Code%20Execution%20via%20Insecure%20Deserialization","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-12471"},{"url":"https://github.com/advisories/GHSA-f842-vw35-9x42"}],"sources":{"cve":[{"id":"CVE-2020-12471","description":"MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages/SocialNetworking/lng/en-US/PhotoGallery.aspx because of deserialization in ModuleGallery.HTML5Upload, ModuleGallery.SilverLightUploadModule, HTML5Upload, and SilverLightUploadHandler.","status":"published","published":"2020-04-29T19:58:15Z","modified":"2024-08-04T11:56:52.057Z","updated_at":"2026-11-02T14:35:53.236501Z"}],"euvd":[{"id":"EUVD-2020-4777","description":"MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages/SocialNetworking/lng/en-US/PhotoGallery.aspx because of deserialization in ModuleGallery.HTML5Upload, ModuleGallery.SilverLightUploadModule, HTML5Upload, and SilverLightUploadHandler.","status":"published","published":"2020-04-29T19:58:15Z","modified":"2024-08-04T11:56:52Z","updated_at":"2026-11-03T03:07:39.896975Z"}],"ghsa":[{"id":"GHSA-f842-vw35-9x42","title":"MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages...","description":"MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages/SocialNetworking/lng/en-US/PhotoGallery.aspx because of deserialization in ModuleGallery.HTML5Upload, ModuleGallery.SilverLightUploadModule, HTML5Upload, and SilverLightUploadHandler.","status":"published","published":"2022-05-24T17:16:53Z","modified":"2023-01-29T05:02:24Z","updated_at":"2026-11-02T14:45:04.822413Z"}],"nvd":[{"id":"CVE-2020-12471","description":"MonoX through 5.1.40.5152 allows remote code execution via HTML5Upload.ashx or Pages/SocialNetworking/lng/en-US/PhotoGallery.aspx because of deserialization in ModuleGallery.HTML5Upload, ModuleGallery.SilverLightUploadModule, HTML5Upload, and SilverLightUploadHandler.","status":"published","published":"2020-04-29T21:15:12.18Z","modified":"2026-06-17T02:51:52.343Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:05:59.718774Z"}]}}