{"id":"CVE-2025-13204","aliases":["GHSA-8gw3-rxh4-v6jx"],"url":"https://o3.security/vulnerability/CVE-2025-13204","summary":"CVE-2025-13204","details":"npm package `expr-eval` is vulnerable to Prototype Pollution. An attacker with access to express eval interface can use JavaScript prototype-based inheritance model to achieve arbitrary code execution. The npm expr-eval-fork package resolves this issue.","published":"2025-11-14T17:02:39.529Z","modified":"2026-08-08T03:30:21.438802117Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"expr-eval","fixedVersion":null},{"ecosystem":"npm","name":"expr-eval-fork","fixedVersion":"2.0.2"}],"fix":{"url":"https://github.com/silentmatt/expr-eval/pull/252/files","label":"silentmatt/expr-eval#252"},"references":[{"type":"WEB","url":"https://github.com/SECCON/SECCON2022_final_CTF/blob/main/jeopardy/web/babybox/solver/solver.py"},{"type":"WEB","url":"https://www.npmjs.com/package/expr-eval-fork"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/13xxx/CVE-2025-13204.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-13204"},{"type":"ADVISORY","url":"https://www.huntr.dev/bounties/1-npm-expr-eval/"},{"type":"FIX","url":"https://github.com/silentmatt/expr-eval/pull/252/files"},{"type":"PACKAGE","url":"https://github.com/jorenbroekema/expr-eval"},{"type":"PACKAGE","url":"https://github.com/silentmatt/expr-eval"},{"type":"EVIDENCE","url":"https://github.com/vladko312/extras/blob/f549d505af300fd74a01b46fab2102990ff1c14d/expr-eval.py"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:30:21.438802117Z"}}