Remote code execution via unchecked featured-image upload
Published Jul 9, 2024 · Updated Apr 8, 2026
Arbitrary file upload in Webnus Modern Events Calendar 7.11.0 and earlier allows remote authenticated users to execute PHP code. The MEC_main::set_featured_image function copies bytes fetched from an attacker-controlled URL into the public uploads directory using its basename, without checking the file type or extension. Subscriber access is sufficient by default; sites that enable guest event submissions expose the same server-code execution path without authentication.
Summary
What happened
Arbitrary file upload in Webnus Modern Events Calendar 7.11.0 and earlier allows remote authenticated users to execute PHP code. The MEC_main::set_featured_image function copies bytes fetched from an attacker-controlled URL into the public uploads directory using its basename, without checking the file type or extension. Subscriber access is sufficient by default; sites that enable guest event submissions expose the same server-code execution path without authentication.
The record
- CVE
- CVE-2024-5441
- Published
- Jul 9, 2024
- Updated
- Apr 8, 2026
- Vendor
- Webnus
- Product
- Modern Events Calendar
- Classifications
- CWE-434, T1505.003, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 9, 2024CVE 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 <=7.11.0
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
No public exploit references are available in this record.
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Reported exploitation
- Wordfence attack telemetryreported exploitation
Technologies
Your stack
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Your stack
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