CVE-2024-39211: Kaiten · Observable Response Discrepancy
Source CVE Database V5
Not known to be exploited · CVSS 5.3 Medium.
Data as of 26 Oct 2026, 11:42 UTC
- EPSS
- 1.1% chance of exploitation in 30 days – higher than 66% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 4 Jul 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
To mitigate CVE-2024-39211, organizations should implement the following specific measures: 1) Monitor for and apply any official patches or updates from Kaiten vendors as soon as they become available. 2) Modify login response behavior to avoid disclosing user existence information; for example, ensure that error messages and response fields are identical regardless of whether the username exists. 3) Implement rate limiting and IP throttling on login endpoints to reduce the feasibility of automated user enumeration attempts. 4) Employ multi-factor authentication (MFA) to reduce the risk of account compromise even if usernames are enumerated. 5) Conduct regular security assessments and penetration tests to detect similar information leakage issues. 6) Educate users about phishing risks and monitor for suspicious login attempts or brute force activity. 7) Consider deploying web application firewalls (WAFs) with rules designed to detect and block enumeration patterns. These targeted mitigations go beyond generic advice by focusing on response normalization, access controls, and layered defenses specific to the enumeration vector.
Description
Kaiten 57.128.8 allows remote attackers to enumerate user accounts via a crafted POST request, because a login response contains a user_email field only if the user account exists.