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Clean Login EUVDEUVD-2026-82689

| CVE-2026-90977 MEDIUM
Incorrect Comparison (CWE-697)
2026-09-18 WPScan GHSA-whxq-7ph8-rv4q
5.3
CVSS 3.1 · Vendor: WPScan
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Severity by source

Vendor (WPScan) PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
5.3 MEDIUM

Remote unauthenticated bypass of a registration CAPTCHA (AV:N/AC:L/PR:N/UI:N); impact is unauthorized account creation, an integrity effect (I:L), not confidentiality, so C:N.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (WPScan).

CVSS VectorVendor: WPScan

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

4
Metadata Corrected
Sep 18, 2026 - 07:40 vuln.today
tag: PHP added
Analysis Generated
Sep 18, 2026 - 07:21 vuln.today
Patch available
Sep 18, 2026 - 07:01 EUVD
CVE Published
Sep 18, 2026 - 06:11 cve.org
MEDIUM 5.3

DescriptionCVE.org

The Clean Login WordPress plugin before 1.19 does not verify its registration CAPTCHA when the stored session value is empty, allowing unauthenticated users to bypass the anti-automation control on the registration form and create accounts without solving it.

AnalysisAI

Bypass of the registration CAPTCHA in the WordPress Clean Login plugin before 1.19 allows unauthenticated attackers to create accounts without solving the challenge when the stored session value is empty. Publicly available exploit code exists, but no confirmed active exploitation (CISA KEV) was reported, and our independent assessment rates this as a genuine low-to-moderate priority issue because the impact is limited to spam and automation abuse rather than compromise of existing accounts or the server. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
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Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Exploitable against the plugin's user registration form specifically when the stored CAPTCHA session value is empty, which causes the verification branch to be skipped - no authentication, no user interaction, and default network reachability of the public registration page. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine but low-to-moderate priority issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Update the Clean Login WordPress plugin to version 1.19 or later; this is the vendor-released patch and the most direct remediation. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-82689 vulnerability details – vuln.today

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