Code execution via unrestricted SparseMatrix deserialization
Published Jun 19, 2025 · Updated Jun 20, 2025
Unsafe deserialization in PowSyBl Core 6.3.0 through 6.7.1 allows attackers to execute code by supplying a serialized SparseMatrix. SparseMatrix.read passes the supplied InputStream directly to ObjectInputStream.readObject without restricting deserialized classes, so a malicious class can run its readObject logic before the result is cast. Exposure requires a consuming application to accept attacker-controlled streams or a local tool to import a serialized matrix from an external source.
Summary
What happened
Unsafe deserialization in PowSyBl Core 6.3.0 through 6.7.1 allows attackers to execute code by supplying a serialized SparseMatrix. SparseMatrix.read passes the supplied InputStream directly to ObjectInputStream.readObject without restricting deserialized classes, so a malicious class can run its readObject logic before the result is cast. Exposure requires a consuming application to accept attacker-controlled streams or a local tool to import a serialized matrix from an external source.
The record
- CVE
- CVE-2025-47771
- Published
- Jun 19, 2025
- Updated
- Jun 20, 2025
- Vendor
- PowSyBl
- Product
- PowSyBl Core
- Classifications
- CWE-502, CAPEC-586
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 19, 2025CVE publishedPublication date reported by the CVE source.
- Jun 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.
- Affected versionversion=>= 6.3.0, < 6.7.2
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
- SparseMatrixDeserializationTest proof of conceptproof of concept · demonstrated
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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