Post ownership reassignment via unchecked avatar key
Published Mar 31, 2026 · Updated Mar 31, 2026
Authorization bypass in Cozmoslabs Profile Builder 3.15.5 and earlier allows remote authenticated users to reassign post ownership. The wppb_save_avatar_value() function accepts a user-controlled object key without validating the referenced post or attachment before writing its post_author field. Subscriber-level access is sufficient, and successful exploitation changes ownership metadata for arbitrary posts or attachments without granting broader administrative control.
Summary
What happened
Authorization bypass in Cozmoslabs Profile Builder 3.15.5 and earlier allows remote authenticated users to reassign post ownership. The wppb_save_avatar_value() function accepts a user-controlled object key without validating the referenced post or attachment before writing its post_author field. Subscriber-level access is sufficient, and successful exploitation changes ownership metadata for arbitrary posts or attachments without granting broader administrative control.
The record
- CVE
- CVE-2026-3139
- Published
- Mar 31, 2026
- Updated
- Mar 31, 2026
- Vendor
- Cozmoslabs
- Product
- Profile Builder
- Classifications
- CWE-639, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 31, 2026CVE publishedPublication date reported by the CVE source.
- Mar 31, 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=* <=3.15.5
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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