{"id":"CVE-2019-9842","aliases":["EUVD-2019-19201","GHSA-q26p-9rm7-92f4"],"status":"published","title":"madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code...","description":"madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension.","severity":{"version":"3.0","score":7.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02163,"percentile":0.82351,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-434"],"published":"2019-06-14T19:14:39Z","modified":"2026-06-17T02:44:42Z","products":[{"vendor":"miniblog_project","product":"miniblog"}],"references":[{"url":"https://github.com/madskristensen/MiniBlog/blob/1a7ae45ddba484e2c8f808e288e018748c9ddb57/Website/app_code/handlers/PostHandler.cs#L85","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://rastating.github.io/miniblog-remote-code-execution/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9842"},{"url":"https://rastating.github.io/miniblog-remote-code-execution"},{"url":"https://github.com/advisories/GHSA-q26p-9rm7-92f4"}],"sources":{"cve":[{"id":"CVE-2019-9842","description":"madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension.","status":"published","published":"2019-06-14T19:14:39Z","modified":"2024-08-04T22:01:54.985Z","updated_at":"2026-11-02T14:20:20.397093Z"}],"euvd":[{"id":"EUVD-2019-19201","description":"madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension.","status":"published","published":"2019-06-14T19:14:39Z","modified":"2024-08-04T22:01:54Z","updated_at":"2026-11-03T02:40:55.125862Z"}],"ghsa":[{"id":"GHSA-q26p-9rm7-92f4","title":"madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code...","description":"madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension.","status":"published","published":"2022-05-24T16:48:05Z","modified":"2024-04-04T00:58:21Z","cvss":[{"version":"3.0","score":7.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:55:53.858593Z"}],"nvd":[{"id":"CVE-2019-9842","description":"madskristensen MiniBlog through 2018-05-18 allows remote attackers to execute arbitrary ASPX code via an IMG element with a data: URL, because SaveFilesToDisk in app_code/handlers/PostHandler.cs writes a decoded base64 string to a file without validating the extension.","status":"published","published":"2019-06-14T20:29:00.353Z","modified":"2026-06-17T02:44:42.12Z","cvss":[{"version":"3.0","score":7.2,"vector":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:05:16.285679Z"}]}}