Authorization Bypass in phpMyFAQ Attachment Management

phpMyFAQ 4.2.0-alpha before 4.2.0-beta contains an authorization bypass vulnerability that allows category-restricted editors to manage attachments of FAQs outside their categories by supplying arbitrary record IDs. Attackers in medium permission mode can send upload or delete requests with a target record_id or attachment ID to tamper with or remove files on unauthorized FAQs.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched 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

phpMyFAQ 4.2.0-alpha through versions before 4.2.0-beta contains a critical authorization bypass vulnerability affecting attachment management. The flaw allows category-restricted editors to manipulate FAQ attachments outside their assigned categories by directly supplying arbitrary record IDs in API requests. This means an attacker with medium-level permissions (editor role) can upload malicious files or delete legitimate attachments on FAQs they should not have access to, potentially compromising FAQ integrity, injecting malware, or disrupting knowledge base operations. Organizations running affected phpMyFAQ versions are at risk, particularly those relying on role-based access controls to segregate editor responsibilities across FAQ categories.

Casky's 283 matched security skills detect the attack patterns underlying this vulnerability by identifying improper access control implementations mapped to MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access). Using Claude AI with extended reasoning, practitioners would observe findings related to CWE-862 (Missing Authorization) patterns: direct object reference manipulation where attachment operations lack proper authorization checks, insufficient validation of the requester's category permissions before processing upload/delete requests, and parameter tampering indicators where record_id values are modified outside normal workflow. The skill set flags unauthorized lateral movement attempts across category boundaries and detects anomalous attachment management activity that violates expected role-based boundaries.

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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 →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-111897.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004 TA0006

Investigate the attack patterns behind CVE-2026-111897

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