2.3

CVE-2025-24369: Anubis has a bot protection bypass when a sophisticated attacker asks to pass a challenge of difficulty 0

Deferred
AliasesGO-2025-3424GHSA-56w8-8ppj-2p4fopenSUSE-SU-2025:15847-1
Published 27-01-2025Last modified 28-01-2025

Vulnerability summary

CVE-2025-24369 is a low (CVSS 2.3) vulnerability in xe x. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
2.3/10
010
Low · v4.0 (CVE.org)
EPSS score
0.43%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2025:14728-1SUSE-SU-2025:0429-1

Timeline

  1. 27-01-2025
    PublishedVulnerability first disclosed.
  2. 28-01-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.41% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • anubis< 1.15.2-r0
Github.com/Xe1 product
  • xAll versions (No fix recorded)
Opensuse1 product
  • anubis&distro=openSUSE Tumbleweed< 1.24.0-1.1
Xe1 product
  • x< v1.11.0-37-gd98d70a

4 vendors · 4 products

References

7 links