Predictable API Token Generation Enables WordPress Plugin RCE

The wpShopGermany IT-RECHT KANZLEI WordPress plugin before 2.4 does not generate its API authentication token securely, deriving it from data the requester controls and creating it as a side effect of the check that is supposed to validate it, allowing unauthenticated attackers to predict the token and use the access it grants to write arbitrary files, 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

The wpShopGermany IT-RECHT KANZLEI WordPress plugin before version 2.4 contains a critical vulnerability in its API authentication mechanism. The plugin derives its API tokens from attacker-controlled request data and generates the token as a side effect of validating it—a fundamental cryptographic design flaw. This allows unauthenticated attackers to predict valid authentication tokens, bypass API security controls, and gain unauthorized write access to the server. The vulnerability is particularly dangerous because it enables arbitrary file write operations, leading directly to remote code execution. Any WordPress site running the affected plugin version is at risk, with no authentication barrier protecting the malicious actions.

Casky's 323 matching skills leverage Claude's extended reasoning to detect the attack patterns underlying this CVE across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0043 (Reconnaissance). Practitioners using Casky would identify suspicious activity patterns including: unauthenticated API requests with predictable token sequences, file write operations to sensitive directories (wp-content, wp-admin), and suspicious PHP file creation events. The platform's skill mapping would surface indicators of token prediction attempts, abnormal API call timing that suggests token enumeration, and post-exploitation file access patterns. Security teams would see correlations between failed authentication attempts using sequential token values and subsequent successful write operations—the hallmark of this vulnerability's exploitation chain—enabling rapid detection and containment before code execution occurs.

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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-2026-88795.

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

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