CVE-2025-65849

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [{"sourceIdentifier": "cve@mitre.org", "tags": ["disputed"]}], "descriptions": [{"lang": "en", "value": "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 \u201cthe 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.\u201d"}, {"lang": "es", "value": "Una ruptura criptoanal\u00edtica en el modo de ofuscaci\u00f3n Proof-of-Work de Altcha versi\u00f3n 0.8.0 y posteriores permite a los visitantes remotos recuperar el nonce de Proof-of-Work en tiempo constante mediante deducci\u00f3n matem\u00e1tica. NOTA: esto es disputado por el Proveedor porque el objetivo del producto es 'desalentar el scraping automatizado / bots, no garantizar la resistencia a atacantes decididos.' La documentaci\u00f3n establece 'el objetivo no es proporcionar un algoritmo criptogr\u00e1fico seguro sino utilizar un mecanismo de prueba de trabajo que permita a cualquier dispositivo capaz descifrar los datos ocultos.'"}], "id": "CVE-2025-65849", "lastModified": "2026-10-18T15:10:00.097", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-65849", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-12-09T20:01:39.977561Z", "version": "2.0.3"}}]}, "published": "2025-12-08T19:15:50.817", "references": [{"source": "cve@mitre.org", "url": "https://altcha.org/docs/v2/obfuscation/"}, {"source": "cve@mitre.org", "url": "https://github.com/altcha-org/altcha/blob/154f874cbcdd4e639783463130d13988a2bd1bdc/src/helpers.ts#L170-L194"}, {"source": "cve@mitre.org", "url": "https://github.com/eternal-flame-AD/altcha-deobfs"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-327"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"created": "2025-12-09T10:26:36.175412+00:00", "updated": "2025-12-09T10:26:36.175452+00:00", "vendors": ["altcha", "altcha$PRODUCT$altcha"]}