Account takeover via default JWT signing secret
Published Dec 27, 2025 · Updated Dec 27, 2025
Authentication bypass in Maxun 0.0.28 and earlier allows remote attackers to access other accounts with forged JWT cookies. The ENVEXAMPLE file supplies a fixed JWT_SECRET, while auth.ts accepts the signed user ID claim when serving the API-key endpoint. Deployments retaining that default secret allow attackers to forge tokens, enumerate numeric user IDs, and read other users’ API keys.
Summary
What happened
Authentication bypass in Maxun 0.0.28 and earlier allows remote attackers to access other accounts with forged JWT cookies. The ENVEXAMPLE file supplies a fixed JWT_SECRET, while auth.ts accepts the signed user ID claim when serving the API-key endpoint. Deployments retaining that default secret allow attackers to forge tokens, enumerate numeric user IDs, and read other users’ API keys.
The record
- CVE
- CVE-2025-15105
- Published
- Dec 27, 2025
- Updated
- Dec 27, 2025
- Vendor
- Maxun
- Product
- Maxun
- Classifications
- CWE-320, CWE-321, CWE-798, T1550.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 27, 2025CVE publishedPublication date reported by the CVE source.
- Dec 27, 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.
- Affected versionversion=0.0.1
- Affected versionversion=0.0.10
- Affected versionversion=0.0.11
- Affected versionversion=0.0.12
- Affected versionversion=0.0.13
- Affected versionversion=0.0.14
- Affected versionversion=0.0.15
- Affected versionversion=0.0.16
- Affected versionversion=0.0.17
- Affected versionversion=0.0.18
- Affected versionversion=0.0.19
- Affected versionversion=0.0.2
- Affected versionversion=0.0.20
- Affected versionversion=0.0.21
- Affected versionversion=0.0.22
- Affected versionversion=0.0.23
- Affected versionversion=0.0.24
- Affected versionversion=0.0.25
- Affected versionversion=0.0.26
- Affected versionversion=0.0.27
- Affected versionversion=0.0.28
- Affected versionversion=0.0.3
- Affected versionversion=0.0.4
- Affected versionversion=0.0.5
- Affected versionversion=0.0.6
- Affected versionversion=0.0.7
- Affected versionversion=0.0.8
- Affected versionversion=0.0.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- maxun_hardcode.mdproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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