{"id":"CVE-2024-28191","aliases":["EUVD-2024-1135","GHSA-747v-52c4-8vj8"],"status":"published","title":"Contao may have unencoded insert tags in the frontend","description":"Contao is an open source content management system. Starting in version 4.0.0 and prior to version 4.13.40 and 5.3.4, it is possible to inject insert tags in frontend forms if the output is structured in a very specific way. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, do not output user data from frontend forms next to each other, always separate them by at least one character.","severity":{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00497,"percentile":0.42917,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-74"],"published":"2024-04-09T13:54:22Z","modified":"2026-10-28T02:31:11Z","fixes":[{"ecosystem":"Packagist","package":"contao/core-bundle","fixed_in":["4.13.40","5.3.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"contao/core-bundle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.13.40"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"contao/core-bundle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0-RC1"},{"fixed":"5.3.4"}]}]},{"source":"osv","ecosystem":"Packagist","package":"contao/core-bundle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0"},{"fixed":"4.13.40"}]}],"versions":["4.0.0","4.0.1","4.0.2","4.0.3","4.0.4","4.1.0","4.1.0-RC1","4.1.0-beta1","4.1.1","4.1.2","4.1.3","4.10.0","4.10.0-RC1","4.10.0-RC2","4.10.0-RC3","4.10.0-RC4","4.10.1","4.10.2","4.10.3","4.10.4","4.10.5","4.10.6","4.10.7","4.11.0","4.11.0-RC1","4.11.0-RC2","4.11.1","4.11.2","4.11.3","4.11.4","4.11.5","4.11.6","4.11.7","4.11.8","4.11.9","4.12.0","4.12.0-RC1","4.12.0-RC2","4.12.0-RC3","4.12.1","4.12.2","4.12.3","4.12.4","4.12.5","4.12.6","4.12.7","4.13.0","4.13.0-RC1","4.13.0-RC2","4.13.0-RC3","4.13.1","4.13.10","4.13.11","4.13.12","4.13.13","4.13.14","4.13.15","4.13.16","4.13.17","4.13.18","4.13.19","4.13.2","4.13.20","4.13.21","4.13.22","4.13.23","4.13.24","4.13.25","4.13.26","4.13.27","4.13.28","4.13.29","4.13.3","4.13.30","4.13.31","4.13.32","4.13.33","4.13.34","4.13.35","4.13.36","4.13.37","4.13.38","4.13.39","4.13.4","4.13.5","4.13.6","4.13.7","4.13.8","4.13.9","4.2.0","4.2.0-RC1","4.2.0-beta1","4.2.1","4.2.2","4.2.3","4.2.4","4.2.5","4.3.0","4.3.0-RC1","4.3.1","4.3.10","4.3.11","4.3.2","4.3.3","4.3.4","4.3.5","4.3.6","4.3.7","4.3.8","4.3.9","4.4.0","4.4.0-RC1","4.4.0-RC2","4.4.0-beta1","4.4.1","4.4.10","4.4.11","4.4.12","4.4.13","4.4.14","4.4.15","4.4.16","4.4.17","4.4.18","4.4.19","4.4.2","4.4.20","4.4.21","4.4.22","4.4.23","4.4.24","4.4.25","4.4.26","4.4.27","4.4.28","4.4.29","4.4.3","4.4.30","4.4.31","4.4.32","4.4.33","4.4.34","4.4.35","4.4.36","4.4.37","4.4.38","4.4.39","4.4.4","4.4.40","4.4.41","4.4.42","4.4.43","4.4.44","4.4.45","4.4.46","4.4.47","4.4.48","4.4.49","4.4.5","4.4.50","4.4.51","4.4.52","4.4.53","4.4.54","4.4.55","4.4.56","4.4.57","4.4.6","4.4.7","4.4.8","4.4.9","4.5.0","4.5.0-RC1","4.5.0-RC2","4.5.0-beta1","4.5.0-beta2","4.5.0-beta3","4.5.1","4.5.10","4.5.11","4.5.12","4.5.13","4.5.14","4.5.2","4.5.3","4.5.4","4.5.5","4.5.6","4.5.7","4.5.8","4.5.9","4.6.0","4.6.0-RC1","4.6.0-RC2","4.6.0-RC3","4.6.1","4.6.10","4.6.11","4.6.12","4.6.13","4.6.14","4.6.2","4.6.3","4.6.4","4.6.5","4.6.6","4.6.7","4.6.8","4.6.9","4.7.0","4.7.0-RC1","4.7.0-RC2","4.7.0-RC3","4.7.0-RC4","4.7.1","4.7.2","4.7.3","4.7.4","4.7.5","4.7.6","4.7.7","4.8.0","4.8.0-RC1","4.8.0-RC2","4.8.1","4.8.2","4.8.3","4.8.4","4.8.5","4.8.6","4.8.7","4.8.8","4.9.0","4.9.0-RC1","4.9.0-RC2","4.9.1","4.9.10","4.9.11","4.9.12","4.9.13","4.9.14","4.9.15","4.9.16","4.9.17","4.9.18","4.9.19","4.9.2","4.9.20","4.9.21","4.9.22","4.9.23","4.9.24","4.9.25","4.9.26","4.9.27","4.9.28","4.9.29","4.9.3","4.9.30","4.9.31","4.9.32","4.9.33","4.9.34","4.9.35","4.9.36","4.9.37","4.9.38","4.9.39","4.9.4","4.9.40","4.9.41","4.9.42","4.9.5","4.9.6","4.9.7","4.9.8","4.9.9"]},{"source":"osv","ecosystem":"Packagist","package":"contao/core-bundle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0-RC1"},{"fixed":"5.3.4"}]}],"versions":["5.0.0","5.0.0-RC1","5.0.0-RC2","5.0.0-RC3","5.0.0-RC4","5.0.1","5.0.10","5.0.2","5.0.3","5.0.4","5.0.5","5.0.6","5.0.7","5.0.8","5.0.9","5.1.0","5.1.0-RC1","5.1.0-RC2","5.1.0-RC3","5.1.1","5.1.10","5.1.11","5.1.2","5.1.3","5.1.4","5.1.5","5.1.6","5.1.7","5.1.8","5.1.9","5.2.0","5.2.0-RC1","5.2.0-RC2","5.2.0-RC3","5.2.0-RC4","5.2.0-RC5","5.2.0-RC6","5.2.1","5.2.10","5.2.2","5.2.3","5.2.4","5.2.5","5.2.6","5.2.7","5.2.8","5.2.9","5.3.0","5.3.0-RC1","5.3.0-RC2","5.3.0-RC3","5.3.0-RC4","5.3.1","5.3.2","5.3.3"]}],"products":[{"vendor":"contao","product":"contao"}],"references":[{"url":"https://github.com/contao/contao/security/advisories/GHSA-747v-52c4-8vj8","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/contao/contao/commit/388859dcf110ca70e0fae68a2a5579ab6a702919","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://github.com/contao/contao/commit/474a2fc25f1d84d786aba8c6d234af99e64d016b","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://contao.org/en/security-advisories/insert-tag-injection-via-the-form-generator","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-28191","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-747v-52c4-8vj8"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/28xxx/CVE-2024-28191.json","tags":["advisory"]},{"url":"https://github.com/contao/contao","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2024-28191","title":"Contao may have unencoded insert tags in the frontend","description":"Contao is an open source content management system. Starting in version 4.0.0 and prior to version 4.13.40 and 5.3.4, it is possible to inject insert tags in frontend forms if the output is structured in a very specific way. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, do not output user data from frontend forms next to each other, always separate them by at least one character.","status":"published","published":"2024-04-09T13:54:22.129Z","modified":"2024-08-02T00:48:49.484Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:34:18.597034Z"}],"euvd":[{"id":"EUVD-2024-1135","description":"Contao is an open source content management system. Starting in version 4.0.0 and prior to version 4.13.40 and 5.3.4, it is possible to inject insert tags in frontend forms if the output is structured in a very specific way. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, do not output user data from frontend forms next to each other, always separate them by at least one character.","status":"published","published":"2024-04-09T13:54:22Z","modified":"2024-08-02T00:48:49Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-03T03:50:26.752963Z"}],"ghsa":[{"id":"GHSA-747v-52c4-8vj8","title":"Contao: Unencoded insert tags in the frontend","description":"### Impact\n\nIt is possible to inject insert tags via the form generator if the submitted form data is output on the page in a specific way.\n\n### Patches\n\nUpdate to Contao 4.13.40 or 5.3.4.\n\n### Workarounds\n\nDo not output the submitted form data on the website.\n\n### References\n\nhttps://contao.org/en/security-advisories/insert-tag-injection-via-the-form-generator\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in [contao/contao](https://github.com/contao/contao/issues/new/choose).","status":"published","published":"2024-04-09T18:52:51Z","modified":"2024-04-09T18:52:57Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:37:42.744468Z"}],"nvd":[{"id":"CVE-2024-28191","description":"Contao is an open source content management system. Starting in version 4.0.0 and prior to version 4.13.40 and 5.3.4, it is possible to inject insert tags in frontend forms if the output is structured in a very specific way. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, do not output user data from frontend forms next to each other, always separate them by at least one character.","status":"published","published":"2024-04-09T14:15:08.71Z","modified":"2026-06-17T07:21:10.53Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:09:48.152273Z"}],"osv":[{"id":"CVE-2024-28191","title":"Contao may have unencoded insert tags in the frontend","description":"Contao is an open source content management system. Starting in version 4.0.0 and prior to version 4.13.40 and 5.3.4, it is possible to inject insert tags in frontend forms if the output is structured in a very specific way. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, do not output user data from frontend forms next to each other, always separate them by at least one character.","status":"published","published":"2024-04-09T13:54:22.129Z","modified":"2026-10-28T02:31:11.242073595Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T15:44:39.569658Z"},{"id":"GHSA-747v-52c4-8vj8","title":"Contao: Unencoded insert tags in the frontend","description":"### Impact\n\nIt is possible to inject insert tags via the form generator if the submitted form data is output on the page in a specific way.\n\n### Patches\n\nUpdate to Contao 4.13.40 or 5.3.4.\n\n### Workarounds\n\nDo not output the submitted form data on the website.\n\n### References\n\nhttps://contao.org/en/security-advisories/insert-tag-injection-via-the-form-generator\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in [contao/contao](https://github.com/contao/contao/issues/new/choose).","status":"published","published":"2024-04-09T18:52:51Z","modified":"2026-09-10T03:50:12.43961097Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T15:46:40.308826Z"}]}}