{"cve":"CVE-2021-38193","nvd":{"published":"2021-08-08T06:15:09.043","modified":"2026-06-17T04:01:43.997","status":"Modified","description":"An issue was discovered in the ammonia crate before 3.1.0 for Rust. XSS can occur because the parsing differences for HTML, SVG, and MathML are mishandled, a similar issue to CVE-2020-26870.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/ammonia/RUSTSEC-2021-0074.md","https://rustsec.org/advisories/RUSTSEC-2021-0074.html","https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/ammonia/RUSTSEC-2021-0074.md","https://rustsec.org/advisories/RUSTSEC-2021-0074.html"],"products":["ammonia_project:ammonia"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-38193","score":0.00705,"percentile":0.53367,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-5325-xw5m-phm3","url":"https://osv.dev/vulnerability/GHSA-5325-xw5m-phm3","summary":"Cross-site Scripting in ammonia","modified":"2023-11-08T04:06:26.105627Z","packages":[{"ecosystem":"crates.io","name":"ammonia","purl":"pkg:cargo/ammonia","ranges":[">=3.0.0 <3.1.0"],"fixed":["3.1.0"]},{"ecosystem":"crates.io","name":"ammonia","purl":"pkg:cargo/ammonia","ranges":["<2.1.3"],"fixed":["2.1.3"]}]},{"id":"RUSTSEC-2021-0074","url":"https://osv.dev/vulnerability/RUSTSEC-2021-0074","summary":"Incorrect handling of embedded SVG and MathML leads to mutation XSS","modified":"2023-11-08T04:06:26.105627Z","packages":[{"ecosystem":"crates.io","name":"ammonia","purl":"pkg:cargo/ammonia","ranges":[">=0.0.0-0 <2.1.3",">=3.0.0 <3.1.0"],"fixed":["2.1.3","3.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}