{"id":"GHSA-24p5-x9f9-vvpx","aliases":["CVE-2021-20681"],"title":"Cross-site Scripting (XSS) in baserCMS","description":"Improper neutralization of JavaScript input in the page editing function of baserCMS versions prior to 4.4.5 allows remote authenticated attackers to inject an arbitrary script via unspecified vectors.","severity":"medium","score":5.4,"published":"2021-06-08T20:10:27.000Z","modified":"2026-09-10T03:49:14.992Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"baserproject/basercms","ranges":[{"events":[{"introduced":"0"},{"fixed":"4.4.5"}],"type":"ECOSYSTEM"}],"versions":["0.0.1","0.0.2","0.0.3","0.0.4","0.0.5","0.0.6","0.0.7","0.0.8","1.0.0","2.0.0-rc1","2.0.0-rc2","2.0.0-rc3","2.0.0-rc4","2.0.0-rc5","2.0.0-rc6","3.0.10","3.0.10.1","3.0.11","3.0.11.1","3.0.12","3.0.13","3.0.14","3.0.15","3.0.16","3.0.17","3.0.18","3.0.19","3.0.20","3.0.21","3.0.22","3.0.23","3.0.24","3.0.25","3.0.26","3.0.7","3.0.7.1","3.0.8","3.0.8.1","3.0.9","3.0.9.1","4.0.0","4.0.0-beta","4.0.1","4.0.10","4.0.10.1","4.0.11","4.0.2","4.0.2.1","4.0.3","4.0.4","4.0.5","4.0.5.1","4.0.5.2","4.0.6","4.0.7","4.0.8","4.0.9","4.1.0","4.1.0.1","4.1.1","4.1.2","4.1.3","4.1.4","4.1.5","4.1.6","4.1.7","4.1.8","4.2.0","4.2.1","4.2.2","4.2.3","4.2.4","4.2.5","4.3.0","4.3.1","4.3.2","4.3.3","4.3.4","4.3.5","4.3.6","4.3.7","4.3.7.1","4.4.0","4.4.1","4.4.1.1","4.4.2","4.4.2.1","4.4.3","4.4.4"],"fixed":["4.4.5"]}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2021-20681","https://basercms.net/security/JVN64869876","https://jvn.jp/en/jp/JVN64869876/index.html"],"sources":[{"name":"OSV","id":"GHSA-24p5-x9f9-vvpx","modified":"2026-09-10T03:49:14.992435495Z","url":"https://osv.dev/vulnerability/GHSA-24p5-x9f9-vvpx"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4}]}