Post Duplicator Plugin Allows Privilege Escalation via Option Override

The Post Duplicator WordPress plugin before 3.0.18 does not restrict settings saves to its own options, allowing a site administrator on a multisite network who is not a Super Admin to overwrite arbitrary options of their site, including the role definitions, and so grant themselves network-management capabilities.

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

The Post Duplicator WordPress plugin before version 3.0.18 contains a privilege escalation vulnerability (CWE-863: Improper Authorization) that allows site administrators on multisite networks to bypass role-based access controls. By exploiting insufficient input validation on settings saves, non-Super Admin users can overwrite arbitrary WordPress options, including role definitions, to grant themselves network-management capabilities they should not possess. This vulnerability is particularly dangerous in managed hosting and agency environments where multiple administrators operate on shared WordPress multisite installations, as a compromised or malicious site admin can escalate privileges to control the entire network.

Casky.ai's 283 mapped skills detect the attack patterns behind this CVE by analyzing MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access). Using Claude's extended reasoning capabilities, practitioners would identify suspicious activity patterns including: unauthorized modifications to WordPress role and capability options, unexpected changes to administrator user metadata, settings API calls bypassing proper capability checks, and role definitions being altered outside normal administrative workflows. The platform would correlate these findings with CWE-863 authorization flaws and highlight where input validation gaps in the Post Duplicator plugin allow direct option manipulation. Security teams would see alerts flagging attempts to modify `wp_user_roles` or similar core options through non-Super Admin accounts, enabling rapid detection of both pre-exploitation reconnaissance and active privilege escalation attempts.

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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-2026-121874.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

cryptography · low

Run

MITRE ATT&CK Techniques

TA0004 TA0006

Investigate the attack patterns behind CVE-2026-121874

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