{"id":"CVE-2021-24591","aliases":["EUVD-2021-11503","GHSA-c3m7-gw6j-3wx2"],"status":"published","title":"Highlight \u003c 0.9.3 - Authenticated Stored Cross-Site Scripting","description":"The Highlight WordPress plugin before 0.9.3 does not sanitise its CustomCSS setting, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed","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":0.00624,"percentile":0.50277,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-09-06T11:09:30Z","modified":"2026-06-17T03:40:17Z","products":[{"vendor":"dn88","product":"highlight"},{"vendor":"dna88","product":"highlight"},{"vendor":"unknown","product":"highlight"}],"references":[{"url":"https://wpscan.com/vulnerability/c5cbe3b4-2829-4fd2-8194-4b3a2ae0e257","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-24591"},{"url":"https://github.com/advisories/GHSA-c3m7-gw6j-3wx2"}],"sources":{"cve":[{"id":"CVE-2021-24591","title":"Highlight \u003c 0.9.3 - Authenticated Stored Cross-Site Scripting","description":"The Highlight WordPress plugin before 0.9.3 does not sanitise its CustomCSS setting, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed","status":"published","published":"2021-09-06T11:09:30Z","modified":"2024-08-03T19:35:20.273Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:04.679189Z"}],"euvd":[{"id":"EUVD-2021-11503","description":"The Highlight WordPress plugin before 0.9.3 does not sanitise its CustomCSS setting, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed","status":"published","published":"2021-09-06T11:09:30Z","modified":"2024-08-03T19:35:20Z","updated_at":"2026-11-03T03:24:56.857735Z"}],"ghsa":[{"id":"GHSA-c3m7-gw6j-3wx2","title":"The Highlight WordPress plugin before 0.9.3 does not sanitise its CustomCSS setting, allowing...","description":"The Highlight WordPress plugin before 0.9.3 does not sanitise its CustomCSS setting, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed","status":"published","published":"2022-05-24T19:13:04Z","modified":"2023-01-30T05:01:55Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:30.744651Z"}],"nvd":[{"id":"CVE-2021-24591","description":"The Highlight WordPress plugin before 0.9.3 does not sanitise its CustomCSS setting, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed","status":"published","published":"2021-09-06T11:15:08.467Z","modified":"2026-06-17T03:40:17.493Z","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"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:58.05696Z"}]}}