{"id":"CVE-2021-27770","aliases":["EUVD-2021-14511","GHSA-mxvv-v7w8-j88h"],"status":"published","title":"HCL Sametime is vulnerable to arbitrary HTTP requests","description":"The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then requested by the webserver. We assume this service is used by the “meetings”-function where users can specify an external URL where the online meeting will take place.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-07","score":0.00736,"percentile":0.54698,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-472","CWE-668"],"published":"2022-05-12T21:25:25Z","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-2021-27770"},{"url":"https://github.com/advisories/GHSA-mxvv-v7w8-j88h"}],"sources":{"cve":[{"id":"CVE-2021-27770","title":"HCL Sametime is vulnerable to arbitrary HTTP requests","description":"The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then requested by the webserver. We assume this service is used by the “meetings”-function where users can specify an external URL where the online meeting will take place.","status":"published","published":"2022-05-12T21:25:25.427Z","modified":"2024-09-16T20:02:52.78Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-472"],"updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-14511","description":"The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then requested by the webserver. We assume this service is used by the “meetings”-function where users can specify an external URL where the online meeting will take place.","status":"published","published":"2022-05-12T21:25:25Z","modified":"2024-09-16T20:02:52Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T00:55:17.735013Z"}],"ghsa":[{"id":"GHSA-mxvv-v7w8-j88h","title":"The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded...","description":"The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then requested by the webserver. We assume this service is used by the “meetings”-function where users can specify an external URL where the online meeting will take place.","status":"published","published":"2022-05-13T00:00:21Z","modified":"2023-07-09T05:01:59Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-472","CWE-668"],"updated_at":"2026-11-02T14:54:42.043841Z"}],"nvd":[{"id":"CVE-2021-27770","description":"The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then requested by the webserver. We assume this service is used by the “meetings”-function where users can specify an external URL where the online meeting will take place.","status":"published","published":"2022-05-12T22:15:11.823Z","modified":"2026-06-17T03:45:25.68Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-472"],"updated_at":"2026-11-02T14:07:06.029737Z"}]}}