{"id":"CVE-2020-5222","aliases":["EUVD-2020-0270","GHSA-mh8g-hprg-8363"],"status":"published","title":"Hard-Coded Key Used For Remember-me Token in OpenCast","description":"Opencast before 7.6 and 8.1 enables a remember-me cookie based on a hash created from the username, password, and an additional system key. This means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. This problem is fixed in Opencast 7.6 and Opencast 8.1","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00939,"percentile":0.61217,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-798"],"published":"2020-01-30T20:50:13Z","modified":"2026-10-20T10:54:22Z","fixes":[{"ecosystem":"Maven","package":"org.opencastproject:opencast-kernel","fixed_in":["7.6","8.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.opencastproject:opencast-kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.6"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"org.opencastproject:opencast-kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0"},{"fixed":"8.1"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.opencastproject:opencast-kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.6"}]}],"versions":["6.6","7.2","7.3","7.4","7.5"]},{"source":"osv","ecosystem":"Maven","package":"org.opencastproject:opencast-kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0"},{"fixed":"8.1"}]}],"versions":["8.0"]}],"products":[{"vendor":"apereo","product":"opencast"},{"vendor":"opencast","product":"opencast"}],"references":[{"url":"https://github.com/opencast/opencast/security/advisories/GHSA-mh8g-hprg-8363","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Third Party Advisory","advisory","web"]},{"url":"https://github.com/opencast/opencast/commit/1a7172c95af8d542a77ae5b153e4c834dd4788a6","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5222","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-mh8g-hprg-8363"}],"sources":{"cve":[{"id":"CVE-2020-5222","title":"Hard-Coded Key Used For Remember-me Token in OpenCast","description":"Opencast before 7.6 and 8.1 enables a remember-me cookie based on a hash created from the username, password, and an additional system key. This means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. This problem is fixed in Opencast 7.6 and Opencast 8.1","status":"published","published":"2020-01-30T20:50:13Z","modified":"2024-08-04T08:22:08.72Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-798"],"updated_at":"2026-11-02T14:35:47.56691Z"}],"euvd":[{"id":"EUVD-2020-0270","description":"Opencast before 7.6 and 8.1 enables a remember-me cookie based on a hash created from the username, password, and an additional system key. This means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. This problem is fixed in Opencast 7.6 and Opencast 8.1","status":"published","published":"2020-01-30T20:50:13Z","modified":"2024-08-04T08:22:08Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T03:08:07.872525Z"}],"ghsa":[{"id":"GHSA-mh8g-hprg-8363","title":"Hard-Coded Key Used For Remember-me Token in Opencast","description":"### Impact\n\nThe security configuration in `etc/security/mh_default_org.xml` enables a remember-me cookie based on a hash created from the [username, password, and an additional system key](https://docs.spring.io/spring-security/site/docs/3.0.x/reference/remember-me.html). Opencast has hard-coded this system key in the large XML file and never mentions to change this, basically ensuring that all systems use the same key:\n\n```xml\n\u003csec:remember-me key=\"opencast\" user-service-ref=\"userDetailsService\" /\u003e\n```\n\nThis means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. For example, a remember-me token obtained from develop.opencast.org can be used on stable.opencast.org without actually knowing the log-in credentials.\n\nSuch an attack will usually not work on different installations – assuming that safe, unique passwords are used – but it is basically guaranteed to work to get access to all machines of one cluster if a token from one machine is compromised.\n\n### Patches\n\nThis problem is fixed in Opencast 7.6 and Opencast 8.1\n\n### Workarounds\n\nWe strongly recommend updating to the patched version. Still, as a workaround for older versions, in `etc/security/mh_default_org.xml`, set a custom key for each server:\n\n```xml\n\u003csec:remember-me key=\"CUSTOM_RANDOM_KEY\" user-service-ref=\"userDetailsService\" /\u003e\n```\n\n### References\n\n- [Relevant lines in the security configuration](https://github.com/opencast/opencast/blob/161ee619382f144dc35eea211fc6b556025b98e1/etc/security/mh_default_org.xml#L335-L336)\n- [Spring Security Remember-Me Authentication Documentation](https://docs.spring.io/spring-security/site/docs/3.0.x/reference/remember-me.html#remember-me-hash-token)\n\n### For more information\nIf you have any questions or comments about this advisory:\n- Open an issue in [opencast/opencast](https://github.com/opencast/opencast/issues)\n- For security-relevant information, email us at [security@opencast.org](mailto:security@opencast.org)\n\n### Thanks\nThanks to @LukasKalbertodt for reporting the issue.","status":"published","published":"2020-01-30T21:21:44Z","modified":"2023-01-09T05:02:08Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-798"],"updated_at":"2026-11-02T14:36:03.040255Z"}],"nvd":[{"id":"CVE-2020-5222","description":"Opencast before 7.6 and 8.1 enables a remember-me cookie based on a hash created from the username, password, and an additional system key. This means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. This problem is fixed in Opencast 7.6 and Opencast 8.1","status":"published","published":"2020-01-30T21:15:14.98Z","modified":"2026-06-17T03:21:03.337Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/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-798"],"updated_at":"2026-11-02T14:05:53.837808Z"}],"osv":[{"id":"CVE-2020-5222","description":"Opencast before 7.6 and 8.1 enables a remember-me cookie based on a hash created from the username, password, and an additional system key. This means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. This problem is fixed in Opencast 7.6 and Opencast 8.1","status":"published","published":"2020-01-30T21:15:14.98Z","modified":"2026-10-20T10:54:22.038937493Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:16.936975Z"},{"id":"GHSA-mh8g-hprg-8363","title":"Hard-Coded Key Used For Remember-me Token in Opencast","description":"### Impact\n\nThe security configuration in `etc/security/mh_default_org.xml` enables a remember-me cookie based on a hash created from the [username, password, and an additional system key](https://docs.spring.io/spring-security/site/docs/3.0.x/reference/remember-me.html). Opencast has hard-coded this system key in the large XML file and never mentions to change this, basically ensuring that all systems use the same key:\n\n```xml\n\u003csec:remember-me key=\"opencast\" user-service-ref=\"userDetailsService\" /\u003e\n```\n\nThis means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. For example, a remember-me token obtained from develop.opencast.org can be used on stable.opencast.org without actually knowing the log-in credentials.\n\nSuch an attack will usually not work on different installations – assuming that safe, unique passwords are used – but it is basically guaranteed to work to get access to all machines of one cluster if a token from one machine is compromised.\n\n### Patches\n\nThis problem is fixed in Opencast 7.6 and Opencast 8.1\n\n### Workarounds\n\nWe strongly recommend updating to the patched version. Still, as a workaround for older versions, in `etc/security/mh_default_org.xml`, set a custom key for each server:\n\n```xml\n\u003csec:remember-me key=\"CUSTOM_RANDOM_KEY\" user-service-ref=\"userDetailsService\" /\u003e\n```\n\n### References\n\n- [Relevant lines in the security configuration](https://github.com/opencast/opencast/blob/161ee619382f144dc35eea211fc6b556025b98e1/etc/security/mh_default_org.xml#L335-L336)\n- [Spring Security Remember-Me Authentication Documentation](https://docs.spring.io/spring-security/site/docs/3.0.x/reference/remember-me.html#remember-me-hash-token)\n\n### For more information\nIf you have any questions or comments about this advisory:\n- Open an issue in [opencast/opencast](https://github.com/opencast/opencast/issues)\n- For security-relevant information, email us at [security@opencast.org](mailto:security@opencast.org)\n\n### Thanks\nThanks to @LukasKalbertodt for reporting the issue.","status":"published","published":"2020-01-30T21:21:44Z","modified":"2026-09-10T03:48:42.446722125Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-798"],"updated_at":"2026-11-02T15:46:51.811331Z"}]}}