Authenticated object loading via hybrid cookie serializer
Published Jan 16, 2023 · Updated Apr 7, 2025
Deserialization in PredictApp's Cookie Handler allows remote authenticated users to trigger unsafe Ruby object loading through crafted cookies. The new_framework_defaults_7_0.rb initializer selects Rails' hybrid cookie serializer, which accepts legacy Marshal payloads when reading cookies instead of restricting deserialization to JSON. Exploitation requires low-privileged access; the published record does not identify the loadable object classes or bound the resulting confidentiality, integrity, and availability effects beyond low impact.
Summary
What happened
Deserialization in PredictApp's Cookie Handler allows remote authenticated users to trigger unsafe Ruby object loading through crafted cookies. The new_framework_defaults_7_0.rb initializer selects Rails' hybrid cookie serializer, which accepts legacy Marshal payloads when reading cookies instead of restricting deserialization to JSON. Exploitation requires low-privileged access; the published record does not identify the loadable object classes or bound the resulting confidentiality, integrity, and availability effects beyond low impact.
The record
- CVE
- CVE-2022-4890
- Published
- Jan 16, 2023
- Updated
- Apr 7, 2025
- Vendor
- abhilash1985
- Product
- PredictApp
- Classifications
- CWE-502, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 16, 2023CVE publishedPublication date reported by the CVE source.
- Apr 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?
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- Affected versionversion=n/a
What conditions does exploitation require?
What is affected?
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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