Cross-account content injection via CreatorID overwrite
Published Dec 29, 2022 · Updated Apr 10, 2025
Improper value handling in Memos before 0.9.1 allows remote authenticated users to post content as another user via a crafted POST request. The memo creation handler decodes JSON into a structure whose CreatorID was prefilled from the session, allowing a supplied creatorId value to overwrite it. A valid session is required, and exploitation writes attacker-chosen content into another user's memo stream without granting broader account access.
Summary
What happened
Improper value handling in Memos before 0.9.1 allows remote authenticated users to post content as another user via a crafted POST request. The memo creation handler decodes JSON into a structure whose CreatorID was prefilled from the session, allowing a supplied creatorId value to overwrite it. A valid session is required, and exploitation writes attacker-chosen content into another user's memo stream without granting broader account access.
The record
- CVE
- CVE-2022-4851
- Published
- Dec 29, 2022
- Updated
- Apr 10, 2025
- Vendor
- Memos
- Product
- Memos
- Classifications
- CWE-229, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 29, 2022CVE publishedPublication date reported by the CVE source.
- Apr 10, 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=unspecified <0.9.1
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.
Public exploit references
- huntr.dev cross-account memo POST proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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