{"id":"CVE-2025-65849","revision":"96dd7d7eb24349e4ae247ea875a156ef","records":[{"revision":"96dd7d7eb24349e4ae247ea875a156ef","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-65849","aliases":[],"title":"A cryptanalytic break in Altcha Proof-of-Work obfuscation mode version 0.8.0 and later allows for remote visitors to recover the Proof-of-Work nonce in constant time via mathematical deduction. NOTE: this is disputed by the Supplier because…","description":"A cryptanalytic break in Altcha Proof-of-Work obfuscation mode version 0.8.0 and later allows for remote visitors to recover the Proof-of-Work nonce in constant time via mathematical deduction. NOTE: this is disputed by the Supplier because the product's objective is \"to discourage automated scraping / bots, not guarantee resistance to determined attackers.\" The documentation states “the goal is not to provide a secure cryptographic algorithm but to use a proof-of-work mechanism that allows any capable device to decrypt the hidden data.”","state":0,"publishedAt":"2025-12-08T00:00:00+00:00","modifiedAt":"2025-12-11T14:36:52.373+00:00","affected":[{"ecosystem":"Vendor product","name":"n/a","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"n/a\",\n                    \"product\": \"n/a\",\n                    \"versions\": [\n                        {\n                            \"version\": \"n/a\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://github.com/altcha-org/altcha/blob/154f874cbcdd4e639783463130d13988a2bd1bdc/src/helpers.ts#L170-L194","https://altcha.org/docs/v2/obfuscation/","https://github.com/eternal-flame-AD/altcha-deobfs"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-65849","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-65849","identifiers":["CVE-2025-65849"]},"retained":false,"historicalAffected":[]}],"coverage":[]}