{"id":"CVE-2023-45556","aliases":["BIT-mybb-2023-45556","EUVD-2023-49848"],"status":"published","description":"Cross Site Scripting vulnerability in Mybb Mybb Forums v.1.8.33 allows a local attacker to execute arbitrary code via the theme Name parameter in the theme management component.","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":0.00576,"percentile":0.47834,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2023-11-06T00:00:00Z","modified":"2026-06-17T06:28:49Z","fixes":[{"ecosystem":"Bitnami","package":"mybb","fixed_in":["1.8.37"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mybb","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.8.37"}]}]}],"products":[{"vendor":"mybb","product":"mybb"}],"references":[{"url":"https://github.com/Or4ngm4n/Mybb/blob/main/MyBB%201.8.33%20Cross%20Site%20Scripting.txt","tags":["x_transferred","Exploit","web"]},{"url":"https://raw.githubusercontent.com/Or4ngm4n/Mybb/main/Screenshot%202023-10-08%20012112.png","tags":["x_transferred","Product","web"]},{"url":"https://github.com/mybb/mybb/security/advisories/GHSA-4xqm-3cm2-5xgf","tags":["x_transferred","Patch","Third Party Advisory","web"]}],"sources":{"cve":[{"id":"CVE-2023-45556","description":"Cross Site Scripting vulnerability in Mybb Mybb Forums v.1.8.33 allows a local attacker to execute arbitrary code via the theme Name parameter in the theme management component.","status":"published","published":"2023-11-06T00:00:00Z","modified":"2024-09-05T14:16:56.909Z","updated_at":"2026-11-02T14:35:22.640346Z"}],"euvd":[{"id":"EUVD-2023-49848","description":"Cross Site Scripting vulnerability in Mybb Mybb Forums v.1.8.33 allows a local attacker to execute arbitrary code via the theme Name parameter in the theme management component.","status":"published","published":"2023-11-06T00:00:00Z","modified":"2024-09-05T14:16:56Z","updated_at":"2026-11-03T00:56:03.195853Z"}],"nvd":[{"id":"CVE-2023-45556","description":"Cross Site Scripting vulnerability in Mybb Mybb Forums v.1.8.33 allows a local attacker to execute arbitrary code via the theme Name parameter in the theme management component.","status":"published","published":"2023-11-06T22:15:07.99Z","modified":"2026-06-17T06:28:49.22Z","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"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:08:43.669554Z"}],"osv":[{"id":"BIT-mybb-2023-45556","description":"Cross Site Scripting vulnerability in Mybb Mybb Forums v.1.8.33 allows a local attacker to execute arbitrary code via the theme Name parameter in the theme management component.","status":"published","published":"2024-03-06T10:56:58.598Z","modified":"2024-03-06T11:25:28.861Z","updated_at":"2026-11-02T15:28:33.469426Z"}]}}