Anubis has a bot protection bypass when a sophisticated attacker asks to pass a challenge of difficulty 0
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Source | ID | Title |
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EUVD |
EUVD-2025-3683 | Anubis is a tool that allows administrators to protect bots against AI scrapers through bot-checking heuristics and a proof-of-work challenge to discourage scraping from multiple IP addresses. Anubis allows attackers to bypass the bot protection by requesting a challenge, formulates any nonce (such as 42069), and then passes the challenge with difficulty zero. Commit e09d0226a628f04b1d80fd83bee777894a45cd02 fixes this behavior by not using a client-specified difficulty value. |
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.433% probability within 30 days)
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ssvc
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| Description | Anubis is a tool that allows administrators to protect bots against AI scrapers through bot-checking heuristics and a proof-of-work challenge to discourage scraping from multiple IP addresses. Anubis allows attackers to bypass the bot protection by requesting a challenge, formulates any nonce (such as 42069), and then passes the challenge with difficulty zero. Commit e09d0226a628f04b1d80fd83bee777894a45cd02 fixes this behavior by not using a client-specified difficulty value. | |
| Title | Anubis has a bot protection bypass when a sophisticated attacker asks to pass a challenge of difficulty 0 | |
| Weaknesses | CWE-807 | |
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| Metrics |
cvssV4_0
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