Authenticated code execution via unchecked filename upload
Published Jun 1, 2021 · Updated Aug 3, 2024
Arbitrary file upload in External Media before 1.0.34 allows remote authenticated users to execute PHP code through its AJAX action. The upload_remote_file handler accepts a caller-controlled remote URL and filename, then save_remote_file writes it without capability, nonce, or extension validation. Subscriber-level access is sufficient to place executable PHP on the server and take control of the WordPress site.
Summary
What happened
Arbitrary file upload in External Media before 1.0.34 allows remote authenticated users to execute PHP code through its AJAX action. The upload_remote_file handler accepts a caller-controlled remote URL and filename, then save_remote_file writes it without capability, nonce, or extension validation. Subscriber-level access is sufficient to place executable PHP on the server and take control of the WordPress site.
The record
- CVE
- CVE-2021-24311
- Published
- Jun 1, 2021
- Updated
- Aug 3, 2024
- Vendor
- Minnur Yunusov
- Product
- External Media
- Classifications
- CWE-434, T1505.003
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 1, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record 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=1.0.34 <1.0.34
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
- WPScan authenticated arbitrary-file-upload proof of conceptfunctional · validated
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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