{"id":"CVE-2021-27771","aliases":["EUVD-2021-14512","GHSA-3jcp-j236-2qqc"],"status":"published","title":"HCL Sametime is susceptible a file transfer service vulnerability","description":"User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service. When interacting in a normal matter with the Sametime chat application, users hold a cookie containing their session ID (SID). This value is also used when sending chat messages, receiving notifications and/or transferring files.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00732,"percentile":0.5478,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22","CWE-434"],"published":"2022-05-12T21:25:27Z","modified":"2026-06-17T03:45:25Z","products":[{"vendor":"hcl","product":"sametime"},{"vendor":"hcl software","product":"sametime"},{"vendor":"hcltech","product":"sametime"}],"references":[{"url":"https://support.hcltechsw.com/csm?id=kb_article\u0026sysparm_article=KB0097430","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27771"},{"url":"https://github.com/advisories/GHSA-3jcp-j236-2qqc"}],"sources":{"cve":[{"id":"CVE-2021-27771","title":"HCL Sametime is susceptible a file transfer service vulnerability","description":"User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service. When interacting in a normal matter with the Sametime chat application, users hold a cookie containing their session ID (SID). This value is also used when sending chat messages, receiving notifications and/or transferring files.","status":"published","published":"2022-05-12T21:25:27.08Z","modified":"2024-09-17T01:40:42.492Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-434","CWE-22"],"updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-14512","description":"User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service. When interacting in a normal matter with the Sametime chat application, users hold a cookie containing their session ID (SID). This value is also used when sending chat messages, receiving notifications and/or transferring files.","status":"published","published":"2022-05-12T21:25:27Z","modified":"2024-09-17T01:40:42Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:47.904483Z"}],"ghsa":[{"id":"GHSA-3jcp-j236-2qqc","title":"User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing...","description":"User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service. When interacting in a normal matter with the Sametime chat application, users hold a cookie containing their session ID (SID). This value is also used when sending chat messages, receiving notifications and/or transferring files.","status":"published","published":"2022-05-13T00:00:20Z","modified":"2023-02-01T05:02:23Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H","level":"high"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:49:53.83549Z"}],"nvd":[{"id":"CVE-2021-27771","description":"User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service. When interacting in a normal matter with the Sametime chat application, users hold a cookie containing their session ID (SID). This value is also used when sending chat messages, receiving notifications and/or transferring files.","status":"published","published":"2022-05-12T22:15:11.88Z","modified":"2026-06-17T03:45:25.793Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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-22","CWE-434"],"updated_at":"2026-11-02T14:07:06.029737Z"}]}}