CVE-2024-21543
CVE-2024-21543 is a high-severity vulnerability with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.
Key facts
- Severity: High (CVSS 3.x base score 7.1)
- CVSS v4: 5.7
- EPSS exploit prediction: 1% (42nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2024-0205
- Weakness: CWE-287
- Published:
- Last modified:
Description
Versions of the package djoser before 2.3.0 are vulnerable to Authentication Bypass when the authenticate() function fails. This is because the system falls back to querying the database directly, granting access to users with valid credentials, and eventually bypassing custom authentication checks such as two-factor authentication, LDAP validations, or requirements from configured AUTHENTICATION_BACKENDS.
Frequently asked questions
- What is CVE-2024-21543?
- Versions of the package djoser before 2.3.0 are vulnerable to Authentication Bypass when the authenticate() function fails. This is because the system falls back to querying the database directly, granting access to users with valid credentials, and eventually bypassing custom authentication checks such as two-factor authentication, LDAP validations, or requirements from configured AUTHENTICATION_BACKENDS.
- How severe is CVE-2024-21543?
- CVE-2024-21543 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
- Is CVE-2024-21543 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2024-21543?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2024-21543 have an EU (EUVD) identifier?
- Yes. CVE-2024-21543 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0205.
- When was CVE-2024-21543 published?
- CVE-2024-21543 was published on 2024-12-13 and last updated on 2026-06-17.
References
- https://github.com/sunscrapers/djoser/commit/d33c3993c0c735f23cbedc60fa59fce69354f19d
- https://github.com/sunscrapers/djoser/issues/795
- https://github.com/sunscrapers/djoser/pull/819
- https://github.com/sunscrapers/djoser/releases/tag/2.3.0
- https://security.snyk.io/vuln/SNYK-PYTHON-DJOSER-8366540
- https://lists.debian.org/debian-lts-announce/2025/02/msg00023.html
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- CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
- CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…
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