Remote code execution via encrypted filename tampering
Published Jul 13, 2023 · Updated Apr 8, 2026
Arbitrary file upload in WPEverest User Registration & Membership 3.0.2 and earlier allows remote authenticated users to execute PHP code. The ur_upload_profile_pic function decrypts attacker-controlled upload_files metadata with a shared hardcoded key, then renames and moves the temporary image without validating its resulting extension. Subscriber-level access to an enabled profile-picture workflow is sufficient to place and invoke a PHP backdoor on the WordPress server.
Summary
What happened
Arbitrary file upload in WPEverest User Registration & Membership 3.0.2 and earlier allows remote authenticated users to execute PHP code. The ur_upload_profile_pic function decrypts attacker-controlled upload_files metadata with a shared hardcoded key, then renames and moves the temporary image without validating its resulting extension. Subscriber-level access to an enabled profile-picture workflow is sufficient to place and invoke a PHP backdoor on the WordPress server.
The record
- CVE
- CVE-2023-3342
- Published
- Jul 13, 2023
- Updated
- Apr 8, 2026
- Vendor
- WPEverest
- Product
- User Registration & Membership
- Classifications
- CWE-434, T1505.003
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 13, 2023CVE publishedPublication date reported by the CVE source.
- Apr 8, 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=0 <=3.0.2
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.
Weakness, pattern, technique
Public exploit references
- Wordfence authenticated upload exploitation walkthroughproof 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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