CVE-2025-24369 — Anubis has a bot protection bypass when a sophisticated attacker asks to pass a challenge of difficulty 0
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 multipl…
Published: 2025-01-27 · CVSS: 2.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7