Database disclosure via interpolated Massmailer filters
Published Jul 6, 2026 · Updated Jul 6, 2026
SQL injection in FOSSBilling 0.6.0 through 0.7.2 allows remote authenticated users to read database data via Massmailer filters. getMessageReceivers decodes stored user-controlled JSON and concatenates four filter arrays into SQL with sprintf and implode while passing an empty bindings array. Administrator access is required; successful exploitation exposes client data, password hashes, API credentials, and system configuration.
Summary
What happened
SQL injection in FOSSBilling 0.6.0 through 0.7.2 allows remote authenticated users to read database data via Massmailer filters. getMessageReceivers decodes stored user-controlled JSON and concatenates four filter arrays into SQL with sprintf and implode while passing an empty bindings array. Administrator access is required; successful exploitation exposes client data, password hashes, API credentials, and system configuration.
The record
- CVE
- CVE-2026-33734
- Published
- Jul 6, 2026
- Updated
- Jul 6, 2026
- Vendor
- FOSSBilling
- Product
- FOSSBilling
- Classifications
- CWE-89, T1213.001
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jul 6, 2026CVE publishedPublication date reported by the CVE source.
- Jul 6, 2026Record 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=>= 0.6.0, < 0.8.0
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
- FOSSBilling Massmailer SQL injection proof of conceptproof of concept · unverified
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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