WordPress Plugin Backup and Restore 1.0.3 contains an arbitrary file deletion vulnerability that allows authenticated attackers to delete files by manipulating parameters in AJAX requests. Attackers can send POST requests to admin-ajax.php with crafted file_name and folder_name parameters to delete arbitrary files from the WordPress installation directory.
Casky was already ahead
This CVE exploits attack patterns that Casky's 331matched 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.
CVE-2021-47979 is an arbitrary file deletion vulnerability in the WordPress Backup and Restore plugin version 1.0.3 that impacts any WordPress installation using this plugin with authenticated users. The vulnerability allows attackers with user credentials to craft malicious AJAX POST requests to admin-ajax.php, manipulating file_name and folder_name parameters to delete critical files from the WordPress directory structure. This poses a significant risk because successful exploitation can lead to site defacement, loss of functionality, or complete site takeover by deleting essential WordPress files, configuration files, or backup data that administrators depend on for recovery operations.
Casky.ai's 331 mapped skills leverage Claude AI's reasoning capabilities to detect the attack patterns behind this vulnerability by analyzing MITRE ATT&CK techniques TA0001 (Initial Access) and TA0007 (Discovery). Practitioners using Casky would identify suspicious admin-ajax.php POST requests with anomalous file_name and folder_name parameters as indicators of TA0007 discovery activity—attackers probing directory structures. The platform's extended reasoning would correlate repeated failed deletion attempts or patterns of parameter manipulation with post-authentication lateral movement behavior. Practitioners would see findings highlighting CWE-22 path traversal indicators, authentication context abuse, and abnormal file system operations originating from authenticated sessions, allowing them to distinguish legitimate plugin usage from malicious exploitation attempts.
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 →
These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2021-47979.
Casky has 331 skills that investigate the attack patterns behind CVE-2021-47979. Run one and get CVSS-scored findings in 3 minutes.
Run the skill that detects this →analyzing-office365-audit-logs-for-compromise
cloud security · low
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ot ics security · medium
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devsecops · low
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ot ics security · medium
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cloud security · low
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devsecops · low
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ot ics security · medium
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cloud security · low
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ot ics security · medium
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api security · medium
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api security · medium
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api security · medium
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web application security · medium
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web application security · medium
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testing-jwt-token-security
web application security · medium
testing-mobile-api-authentication
mobile security · low
testing-oauth2-implementation-flaws
api security · medium
testing-websocket-api-security
api security · medium
triaging-vulnerabilities-with-ssvc-framework
vulnerability management · medium
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