{"id":"CVE-2020-11055","details":"In BookStack greater than or equal to 0.18.0 and less than 0.29.2, there is an XSS vulnerability in comment creation. A user with permission to create comments could POST HTML directly to the system to be saved in a comment, which would then be executed/displayed to others users viewing the comment. Through this vulnerability custom JavaScript code could be injected and therefore ran on other user machines. This most impacts scenarios where not-trusted users are given permission to create comments. This has been fixed in 0.29.2.","aliases":["GHSA-5vf7-q87h-pg6w"],"modified":"2026-04-11T22:57:03.390736Z","published":"2020-05-07T21:15:11.733Z","related":["GHSA-5vf7-q87h-pg6w"],"references":[{"type":"ADVISORY","url":"http://jvn.jp/en/jp/JVN41035278/index.html"},{"type":"ADVISORY","url":"https://bookstackapp.com/blog/beta-release-v0-29-2/"},{"type":"ADVISORY","url":"https://github.com/BookStackApp/BookStack/releases/tag/v0.29.2"},{"type":"ADVISORY","url":"https://github.com/BookStackApp/BookStack/security/advisories/GHSA-5vf7-q87h-pg6w"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bookstackapp/bookstack","events":[{"introduced":"75915e8a9415af90c8c6402fd822d5c29960d3d3"},{"fixed":"04ecc128a237c22b5ff724f2328f0b6922ff3428"}],"database_specific":{"cpe":"cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*","source":["CPE_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0.18.0"},{"fixed":"0.29.2"}]}}],"versions":["v0.18.0","v0.18.1","v0.18.2","v0.18.3","v0.18.4","v0.18.5","v0.19.0","v0.20.0","v0.20.1","v0.20.2","v0.20.3","v0.21.0","v0.22.0","v0.23.0","v0.23.1","v0.23.2","v0.24.0","v0.24.1","v0.24.2","v0.24.3","v0.25.0","v0.25.1","v0.25.2","v0.25.3","v0.25.4","v0.25.5","v0.26.0","v0.26.1","v0.26.2","v0.26.3","v0.26.4","v0.27","v0.27.1","v0.27.2","v0.27.3","v0.27.4","v0.27.5","v0.28.0","v0.28.1","v0.28.2","v0.28.3","v0.29.0","v0.29.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-11055.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}