Application data alteration via malformed multipart keys
Published Feb 1, 2024 · Updated May 15, 2025
Interpretation conflict in Bref before 2.1.13 allows remote attackers to alter application data through malformed multipart field names. Psr7Bridge's parseKeyAndInsertValueInArray handles a name ending in an open bracket as both nested keys and a literal key, producing a PSR-7 body that differs from PHP's parsing. Exposure requires the Event-Driven Function runtime, a RequestHandlerInterface handler, and application logic that trusts the inconsistent parsed body; the resulting integrity impact depends on that logic.
Summary
What happened
Interpretation conflict in Bref before 2.1.13 allows remote attackers to alter application data through malformed multipart field names. Psr7Bridge's parseKeyAndInsertValueInArray handles a name ending in an open bracket as both nested keys and a literal key, producing a PSR-7 body that differs from PHP's parsing. Exposure requires the Event-Driven Function runtime, a RequestHandlerInterface handler, and application logic that trusts the inconsistent parsed body; the resulting integrity impact depends on that logic.
The record
- CVE
- CVE-2024-24754
- Published
- Feb 1, 2024
- Updated
- May 15, 2025
- Vendor
- Bref
- Product
- Bref
- Classifications
- CWE-436, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 1, 2024CVE publishedPublication date reported by the CVE source.
- May 15, 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=< 2.1.13
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.
Public exploit references
- Malformed multipart field-name proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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