{"id":"CVE-2021-3355","aliases":["EUVD-2021-26686","GHSA-h87g-cj47-crv7"],"status":"published","title":"A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript...","description":"A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0725,"percentile":0.94388,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-79"],"published":"2021-02-24T15:00:48Z","modified":"2026-10-20T10:54:44Z","exploits":[{"source":"exploitdb","id":"EDB-49598","title":"LightCMS 1.3.4 - 'exclusive' Stored XSS","type":"webapps","platform":"multiple","date":"2021-02-26","url":"https://www.exploit-db.com/exploits/49598"}],"products":[{"vendor":"lightcms_project","product":"lightcms"}],"references":[{"url":"https://github.com/eddy8/LightCMS/issues/18","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"http://packetstormsecurity.com/files/161562/LightCMS-1.3.4-Cross-Site-Scripting.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry","evidence"]},{"url":"https://gist.github.com/Peithon/1c628ded0c4fc96c6331c3cce1d0c69b","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://www.exploit-db.com/exploits/49598","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","VDB Entry","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3355"},{"url":"https://github.com/advisories/GHSA-h87g-cj47-crv7"}],"sources":{"cve":[{"id":"CVE-2021-3355","description":"A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.","status":"published","published":"2021-02-24T15:00:48Z","modified":"2024-08-03T16:53:17.48Z","updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-26686","description":"A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.","status":"published","published":"2021-02-24T15:00:48Z","modified":"2024-08-03T16:53:17Z","updated_at":"2026-11-03T03:25:13.052236Z"}],"ghsa":[{"id":"GHSA-h87g-cj47-crv7","title":"A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript...","description":"A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.","status":"published","published":"2022-05-24T17:43:02Z","modified":"2023-01-29T05:05:51Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:45:53.730969Z"}],"nvd":[{"id":"CVE-2021-3355","description":"A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.","status":"published","published":"2021-02-24T15:15:13.933Z","modified":"2026-06-17T04:04:59.61Z","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":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:50.031227Z"}],"osv":[{"id":"CVE-2021-3355","description":"A stored-self XSS exists in LightCMS v1.3.4, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords.","status":"published","published":"2021-02-24T15:15:13.933Z","modified":"2026-10-20T10:54:44.342782117Z","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":"2026-11-02T15:44:20.13324Z"}]}}