EUVD-2026-74688
GHSA-3ghv-v9gq-7ghq
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Stored XSS requires a victim to view the injected page (UI:R); nonce publicly exposed removes any privilege barrier (PR:N); scope changes to victim browser (S:C).
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The WPBot - AI ChatBot for Live Support, Lead Generation, AI Services plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'conversation' parameter in all versions up to, and including, 8.7.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The action is gated only by a nonce that is localized into every public-facing page via wp_localize_script, rendering the nonce check ineffective as an access control barrier for unauthenticated users.
Articles & Coverage 1
AnalysisAI
Stored Cross-Site Scripting in the WPBot AI ChatBot WordPress plugin (QuantumCloud, all versions through 8.7.3) allows unauthenticated remote attackers to inject persistent JavaScript into pages viewed by site users and administrators. The critical design flaw is that the only access gate - a WordPress nonce - is rendered useless because it is embedded in every public-facing page via wp_localize_script, making it fully readable by any visitor. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions are required beyond the WPBot plugin being installed and active with chat sessions enabled on a WordPress site. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector provided (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N) scores to approximately 6.7, not the stated 7.2 - a minor scoring discrepancy worth noting but not materially affecting triage. … 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 to the first version beyond 8.7.3 as published in the WordPress plugin repository - the exact patched release version is not confirmed in the provided data, so consult the Wordfence advisory (https://www.wordfence.com/threat-intel/vulnerabilities/id/710fb372-4b7e-43e3-86a7-417143536f43) and the WordPress.org plugin changelog for the confirmed fix version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all WordPress installations using WPBot AI ChatBot through version 8.7.3 and immediately disable or deactivate the plugin. …
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External POC / Exploit Code
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