CVE-2024-21543Public exploitNetwork attack vector

Token issuance via ignored authentication backend rejection

Published Dec 13, 2024 · Updated Feb 20, 2025

Authentication bypass in Sunscrapers Djoser before 2.3.0 allows remote authenticated users to obtain API tokens despite backend rejection. TokenCreateSerializer.validate calls Django authenticate(), but when it returns None the vulnerable code directly queries User and checks only the password and active flag. Valid account credentials and an authentication backend that denies the login are required; success returns a token that sidesteps added checks such as two-factor or LDAP policy.

CVSS severity7.1
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Sunscrapers Djoser before 2.3.0 allows remote authenticated users to obtain API tokens despite backend rejection. TokenCreateSerializer.validate calls Django authenticate(), but when it returns None the vulnerable code directly queries User and checks only the password and active flag. Valid account credentials and an authentication backend that denies the login are required; success returns a token that sidesteps added checks such as two-factor or LDAP policy.

The record

CVE
CVE-2024-21543
Published
Dec 13, 2024
Updated
Feb 20, 2025
Vendor
Sunscrapers
Product
Djoser
Classifications
CWE-287, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sunscrapers · Djoserversion=0 <2.3.0

Published CVSS scores

7.1Snyk Security TeamCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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