{"id":"CVE-2020-27511","details":"An issue was discovered in the stripTags and unescapeHTML components in Prototype 1.7.3 where an attacker can cause a Regular Expression Denial of Service (ReDOS) through stripping crafted HTML tags.","modified":"2026-07-08T20:30:06.852540Z","published":"2021-06-21T20:15:08.160Z","references":[{"type":"ADVISORY","url":"http://prototypejs.org/"},{"type":"EVIDENCE","url":"https://github.com/prototypejs/prototype/blob/dee2f7d8611248abce81287e1be4156011953c90/src/prototype/lang/string.js#L283"},{"type":"EVIDENCE","url":"https://github.com/yetingli/PoCs/blob/main/CVE-2020-27511/Prototype.md"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/prototypejs/prototype","events":[{"introduced":"2a2fc85322b4715a9513c596e3131690125ab6e2"},{"last_affected":"2a2fc85322b4715a9513c596e3131690125ab6e2"}],"database_specific":{"cpe":"cpe:2.3:a:prototypejs:prototype:1.7.3:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.7.3"},{"last_affected":"1.7.3"}],"source":"CPE_STRING"}}],"versions":["1.7.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27511.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}