{"id":"CVE-2023-44383","aliases":["EUVD-2023-3032","GHSA-rvx8-p3xp-fj3p"],"status":"published","title":"October CMS stored XSS by authenticated backend user with improper configuration","description":"October is a Content Management System (CMS) and web platform to assist with development workflow. A user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported. This issue has been patched in version 3.5.2.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0041,"percentile":0.35729,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2023-11-29T19:57:38Z","modified":"2026-10-28T02:31:09Z","fixes":[{"ecosystem":"Packagist","package":"october/system","fixed_in":["3.5.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"october/system","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.5.2"}]}]},{"source":"osv","ecosystem":"Packagist","package":"october/system","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.5.2"}]}]}],"products":[{"vendor":"octobercms","product":"october"}],"references":[{"url":"https://github.com/octobercms/october/security/advisories/GHSA-rvx8-p3xp-fj3p","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Vendor Advisory","advisory","web"]},{"url":"https://github.com/octobercms/october/commit/b7eed0bbf54d07ff310fcdc7037a8e8bf1f5043b","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44383","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-rvx8-p3xp-fj3p"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/44xxx/CVE-2023-44383.json","tags":["advisory"]},{"url":"https://github.com/octobercms/october","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-44383","title":"October CMS stored XSS by authenticated backend user with improper configuration","description":"October is a Content Management System (CMS) and web platform to assist with development workflow. A user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported. This issue has been patched in version 3.5.2.","status":"published","published":"2023-11-29T19:57:38.263Z","modified":"2025-06-05T13:39:36.615Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:35:21.612665Z"}],"euvd":[{"id":"EUVD-2023-3032","description":"October is a Content Management System (CMS) and web platform to assist with development workflow. A user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported. This issue has been patched in version 3.5.2.","status":"published","published":"2023-11-29T19:57:38Z","modified":"2025-06-05T13:39:36Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T20:32:29.680736Z"}],"ghsa":[{"id":"GHSA-rvx8-p3xp-fj3p","title":"October CMS stored XSS by authenticated backend user with improper configuration","description":"### Impact\n\nA user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported.\n\nSVG files are supported by default in v3 for convenience; however, this has resulted in multiple mistaken vulnerability reports from security researchers. As per the documentation, if a backend user is not trusted, the advice is to remove the `svg` extension from the list of supported file types.\n\n### Patches\n\nThe issue has been patched in v3.5.2 by including an SVG sanister. It is enabled by default for new installations but must be enabled for existing sites in the **config/media.php** file.\n\n```\n'clean_vectors' =\u003e true,\n```\n\n### Workarounds\n\nIf you cannot upgrade for this patch, follow the pervious advice and remove `svg` from the supported file types.\n\n### References\n\n- https://github.com/octobercms/october/blob/3.x/config/media.php\n\nCredits to:\n- Faris Krivic\n- Okan Kurtulus\n- Aldin Visnjic\n- Bug Shankar\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [hello@octobercms.com](mailto:hello@octobercms.com)\n","status":"published","published":"2023-11-29T21:45:31Z","modified":"2023-11-29T21:45:31Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:37:23.843848Z"}],"nvd":[{"id":"CVE-2023-44383","description":"October is a Content Management System (CMS) and web platform to assist with development workflow. A user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported. This issue has been patched in version 3.5.2.","status":"published","published":"2023-11-29T20:15:07.573Z","modified":"2026-06-17T06:27:31.943Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:08:49.393375Z"}],"osv":[{"id":"CVE-2023-44383","title":"October CMS stored XSS by authenticated backend user with improper configuration","description":"October is a Content Management System (CMS) and web platform to assist with development workflow. A user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported. This issue has been patched in version 3.5.2.","status":"published","published":"2023-11-29T19:57:38.263Z","modified":"2026-10-28T02:31:09.519741426Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:33.792101Z"},{"id":"GHSA-rvx8-p3xp-fj3p","title":"October CMS stored XSS by authenticated backend user with improper configuration","description":"### Impact\n\nA user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported.\n\nSVG files are supported by default in v3 for convenience; however, this has resulted in multiple mistaken vulnerability reports from security researchers. As per the documentation, if a backend user is not trusted, the advice is to remove the `svg` extension from the list of supported file types.\n\n### Patches\n\nThe issue has been patched in v3.5.2 by including an SVG sanister. It is enabled by default for new installations but must be enabled for existing sites in the **config/media.php** file.\n\n```\n'clean_vectors' =\u003e true,\n```\n\n### Workarounds\n\nIf you cannot upgrade for this patch, follow the pervious advice and remove `svg` from the supported file types.\n\n### References\n\n- https://github.com/octobercms/october/blob/3.x/config/media.php\n\nCredits to:\n- Faris Krivic\n- Okan Kurtulus\n- Aldin Visnjic\n- Bug Shankar\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [hello@octobercms.com](mailto:hello@octobercms.com)\n","status":"published","published":"2023-11-29T21:45:31Z","modified":"2026-09-10T03:49:59.128171513Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:56.281047Z"}]}}