EUVD-2026-74721
GHSA-5543-49w7-m8jw
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Unauthenticated network access with no interaction required; C:L/I:L reflects impact bounded by registered shortcode ecosystem, no availability impact.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
3DescriptionCVE.org
The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied comment content from being passed to WordPress's shortcode engine, allowing any visitor to have arbitrary shortcodes registered on the site executed server-side and rendered to every subsequent visitor of the page.
AnalysisAI
Unauthenticated shortcode injection in the CleanTalk WordPress anti-spam plugin before 6.87 allows any site visitor to trigger arbitrary shortcodes registered on the target WordPress site to execute server-side, with output persisted and rendered to every subsequent visitor of the affected page. Because shortcode execution scope depends entirely on which shortcodes third-party plugins have registered, actual impact can range from minor data leakage to server-side code execution if code-execution shortcodes are present. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Comments must be enabled on at least one post or page on the target WordPress site - this is the default WordPress configuration, making the attack surface broad. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 6.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N) reflects that exploitation requires no authentication and no user interaction, making it broadly accessible. … 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 CleanTalk to version 6.87 or later, which includes the vendor-released patch addressing this shortcode injection flaw. … Detailed patch versions, workarounds, and compensating controls in full report. |
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