{"id":"CVE-2023-41889","aliases":["EUVD-2023-46372","GHSA-xr45-c2jv-2v9r"],"status":"published","title":"Late-Unicode normalization vulnerability in SHIRASAGI","description":"SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. This happens when a logical validation or a security check is performed before a Unicode normalization. The Unicode character equivalent of a character would resurface after the normalization. The fix is initially performing the Unicode normalization and then strip for all whitespaces and then checking for a blank string. This issue has been fixed in version 1.18.0.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00706,"percentile":0.53641,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-116","CWE-176"],"published":"2023-09-15T20:09:27Z","modified":"2026-10-28T02:30:54Z","products":[{"vendor":"shirasagi","product":"shirasagi"},{"vendor":"shirasagi project","product":"shirasagi"},{"vendor":"ss-proj","product":"shirasagi"}],"references":[{"url":"https://github.com/shirasagi/shirasagi/security/advisories/GHSA-xr45-c2jv-2v9r","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Mitigation","Vendor Advisory","advisory"]},{"url":"https://github.com/shirasagi/shirasagi/blob/f249ce3f06f6bfbc0017b38f5c13de424334c3ea/app/models/concerns/rdf/object.rb#L68-L72","tags":["x_refsource_MISC","x_transferred","Product","web"]},{"url":"https://sim4n6.beehiiv.com/p/unicode-characters-bypass-security-checks","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/41xxx/CVE-2023-41889.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-41889","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-41889","title":"Late-Unicode normalization vulnerability in SHIRASAGI","description":"SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. This happens when a logical validation or a security check is performed before a Unicode normalization. The Unicode character equivalent of a character would resurface after the normalization. The fix is initially performing the Unicode normalization and then strip for all whitespaces and then checking for a blank string. This issue has been fixed in version 1.18.0.\n","status":"published","published":"2023-09-15T20:09:27.714Z","modified":"2024-09-25T18:54:14.277Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-176"],"updated_at":"2026-11-02T14:35:19.217111Z"}],"euvd":[{"id":"EUVD-2023-46372","description":"SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. This happens when a logical validation or a security check is performed before a Unicode normalization. The Unicode character equivalent of a character would resurface after the normalization. The fix is initially performing the Unicode normalization and then strip for all whitespaces and then checking for a blank string. This issue has been fixed in version 1.18.0.\n","status":"published","published":"2023-09-15T20:09:27Z","modified":"2024-09-25T18:54:14Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:28:12.011224Z"}],"nvd":[{"id":"CVE-2023-41889","description":"SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. This happens when a logical validation or a security check is performed before a Unicode normalization. The Unicode character equivalent of a character would resurface after the normalization. The fix is initially performing the Unicode normalization and then strip for all whitespaces and then checking for a blank string. This issue has been fixed in version 1.18.0.\n","status":"published","published":"2023-09-15T21:15:11.503Z","modified":"2026-06-17T06:23:00.74Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-176","CWE-116"],"updated_at":"2026-11-02T14:08:29.595868Z"}],"osv":[{"id":"CVE-2023-41889","title":"Late-Unicode normalization vulnerability in SHIRASAGI","description":"SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. This happens when a logical validation or a security check is performed before a Unicode normalization. The Unicode character equivalent of a character would resurface after the normalization. The fix is initially performing the Unicode normalization and then strip for all whitespaces and then checking for a blank string. This issue has been fixed in version 1.18.0.\n","status":"published","published":"2023-09-15T20:09:27.714Z","modified":"2026-10-28T02:30:54.054463682Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-176"],"updated_at":"2026-11-02T15:44:33.244128Z"}]}}