ManageWP Plugin Allows Unauthorized Admin Login via Replayable Links

The ManageWP Worker WordPress plugin before 4.9.37 does not bind the account being logged in to the signature which authorises the login, nor prevent an already used login link from being replayed, allowing attackers who obtain such a link to gain a session as any user on the site, including an administrator.

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 ManageWP Worker plugin before version 4.9.37 contains a critical authentication bypass vulnerability that allows attackers to hijack user sessions, including administrator accounts. The flaw stems from two design failures: login authorization signatures are not bound to specific user accounts, and the same login link can be replayed multiple times. An attacker who obtains a valid login link—through interception, credential compromise, or social engineering—can use it to log in as any user on the affected WordPress site. This is particularly dangerous for WordPress administrators managing multiple client sites, as a single compromised link could grant full site control to threat actors. Organizations using ManageWP for remote site management face immediate risk of account takeover, data theft, and malicious modifications.

Casky's 283 matched skills leverage Claude's extended reasoning to detect the attack patterns underlying TA0004 (Privilege Escalation) and TA0006 (Credential Access). Practitioners using Casky would identify indicators including: abnormal authentication events where login sessions are established without corresponding credential submissions, detection of signature validation bypasses in authentication logs, and identification of replayed authentication tokens with mismatched user context. The platform's skills would flag suspicious patterns such as single login links being used across multiple user accounts, session establishment from unusual IP ranges or geographic locations, and rapid successive authentication attempts using cached or replayed credentials. Security teams would see findings highlighting the absence of per-user signature binding in API communications and the lack of single-use token enforcement—allowing them to trace exploitation attempts and identify compromised login links before they result in unauthorized administrative access.

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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-2026-18052.

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-2026-18052

Casky has 283 skills that investigate the attack patterns behind CVE-2026-18052. Run one and get CVSS-scored findings in 3 minutes.

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