WordPress Plugin Arbitrary File Write via Unvalidated Export Path

The WP Import Export Lite WordPress plugin before 3.9.34 does not validate a user-supplied output path when writing export files, allowing users granted its export permission to write files with arbitrary names to arbitrary locations on the server, leading to remote code execution.

Casky was already ahead

This CVE exploits attack patterns that Casky's 323matched 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-2026-76550 represents a critical path traversal vulnerability in the WP Import Export Lite WordPress plugin that allows authenticated users with export permissions to write files to arbitrary locations on the server. The vulnerability stems from insufficient validation of user-supplied output paths during the export file creation process, effectively bypassing intended security boundaries. This affects WordPress administrators and plugin users running versions before 3.9.34, making it particularly dangerous in multi-tenant environments or sites where lower-privileged users are granted export functionality. The impact escalates to remote code execution when attackers write malicious PHP files to web-accessible directories, transforming a file-write vulnerability into complete server compromise.

Casky's 323 mapped skills detect the attack patterns underlying this vulnerability by analyzing techniques spanning TA0001 (Initial Access) and TA0043 (Reconnaissance), with Claude's extended reasoning correlating indicators across CWE-94 (Improper Control of Generation of Code). Practitioners using Casky would observe detection patterns identifying: (1) path traversal sequences in export parameters (../ or absolute paths), (2) file operations writing to sensitive directories like /wp-content/plugins or web root, and (3) PHP file creation patterns indicative of webshell deployment. The platform's skill mapping would flag the permission escalation chain—from low-privilege export user to code execution—and correlate it with known exploitation patterns, enabling practitioners to distinguish between legitimate export operations and exploitation attempts before they result in server compromise.

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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 →

323 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-76550.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-76550

Casky has 323 skills that investigate the attack patterns behind CVE-2026-76550. Run one and get CVSS-scored findings in 3 minutes.

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