Unauthenticated File Upload RCE in WordPress Image Cropper

WordPress Background Image Cropper version 1.2 contains a remote code execution vulnerability that allows unauthenticated attackers to upload arbitrary files by accessing the ups.php endpoint. Attackers can upload PHP files through the file upload form in the plugin directory to execute arbitrary code on the server.

Casky was already ahead

This CVE exploits attack patterns that Casky's 419matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2024-58348 is a critical remote code execution vulnerability affecting WordPress Background Image Cropper version 1.2 and earlier. The vulnerability stems from improper file upload validation in the ups.php endpoint, which fails to authenticate requests or properly restrict file types. This allows unauthenticated attackers to upload arbitrary files—particularly PHP files—directly to the plugin directory, leading to immediate code execution on the compromised WordPress installation. The vulnerability is especially dangerous because it requires no authentication, affects a widely-used WordPress plugin, and provides direct shell access to attackers. Any organization running this plugin version is exposed to complete server compromise, data theft, malware distribution, and lateral movement within their infrastructure.

Casky's 419 matching security skills leverage Claude AI's extended reasoning to detect the attack chain mapped to MITRE ATT&CK techniques TA0001 (Reconnaissance), TA0043 (Reconnaissance), and TA0002 (Execution). Practitioners using Casky would identify suspicious activity patterns including: unauthorized HTTP POST requests to /ups.php endpoints (Initial Access), detection of PHP file uploads with unusual MIME types or extensions bypassing validation (Exploitation Technique T1190), and sudden PHP file creation in plugin directories followed by unexpected child processes spawning from web server accounts (Execution, T1059). The platform's skills would correlate these indicators across logs, detecting both the upload phase and subsequent code execution, enabling practitioners to distinguish legitimate plugin updates from exploitation attempts and respond before attackers establish persistence.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

419 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2024-58348.

analyzing-android-malware-with-apktool

malware analysis · medium

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analyzing-apt-group-with-mitre-navigator

threat intelligence · low

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analyzing-bootkit-and-rootkit-samples

malware analysis · medium

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MITRE ATT&CK Techniques

TA0001 TA0043 TA0002

Investigate the attack patterns behind CVE-2024-58348

Casky has 419 skills that investigate the attack patterns behind CVE-2024-58348. Run one and get CVSS-scored findings in 3 minutes.

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