Authentication bypass via hard-coded JWT signing secret
Published Jul 6, 2025 · Updated Jul 7, 2025
Hard-coded credentials in mao888 Bluebell Plus 2.0 through 2.3.0 allow remote attackers to forge JWTs and bypass authentication. The JWT handler stores bluebell-plus in mySecret, uses it to sign HS256 access and refresh tokens, and returns the same value from keyFunc when validating attacker-supplied tokens. No account is required; the published secret permits tokens bearing chosen user identifiers and usernames, enabling unauthorized posting or commenting.
Summary
What happened
Hard-coded credentials in mao888 Bluebell Plus 2.0 through 2.3.0 allow remote attackers to forge JWTs and bypass authentication. The JWT handler stores bluebell-plus in mySecret, uses it to sign HS256 access and refresh tokens, and returns the same value from keyFunc when validating attacker-supplied tokens. No account is required; the published secret permits tokens bearing chosen user identifiers and usernames, enabling unauthorized posting or commenting.
The record
- CVE
- CVE-2025-7079
- Published
- Jul 6, 2025
- Updated
- Jul 7, 2025
- Vendor
- mao888
- Product
- Bluebell Plus
- Classifications
- CWE-798, CWE-255, CWE-259, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 6, 2025CVE publishedPublication date reported by the CVE source.
- Jul 7, 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=2.0
- Affected versionversion=2.1
- Affected versionversion=2.2
- Affected versionversion=2.3.0
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
- Hardcoded JWT Secret Leads to Authentication Bypassproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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