EUVD-2026-86626
GHSA-7xp3-pmg2-gcq4
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Remote unauthenticated header spoofing with no interaction (AV:N/AC:L/PR:N/UI:N); no data exposure or tampering (C:N/I:N); only depletion of the metered AI feature (A:L).
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
4DescriptionCVE.org
The wpForo Forum WordPress plugin from 3.0.0 before 3.1.6 does not verify the source of client-supplied IP address headers before using them to key its per-visitor rate limit on paid AI requests, allowing unauthenticated attackers to bypass the limit by spoofing the header and exhaust the site owner's metered AI credits.
AnalysisAI
Rate-limit bypass in the wpForo Forum WordPress plugin (3.0.0 up to but not including 3.1.6) allows unauthenticated remote attackers to drain a site owner's paid, metered AI credits by spoofing the client-supplied IP header the plugin trusts when keying its per-visitor throttle on AI requests. Exploitation requires the plugin's paid/metered AI feature to be enabled and funded, and the deployment must accept forwarded-IP headers from untrusted clients; there is no code execution, data disclosure, or privilege gain, with impact limited to financial/resource exhaustion (CVSS 5.3, A:L), and publicly available exploit code exists, though there is no confirmed active exploitation (not in CISA KEV). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a wpForo Forum install (3.0.0 up to but not including 3.1.6) with the plugin's paid/metered AI request feature enabled and funded, since the abusable resource is the owner's AI credits; and the deployment must accept and trust client-supplied IP headers (e.g. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but LOW-to-MODERATE priority issue: a rate-limit bypass whose only impact is financial resource exhaustion, not code execution or data compromise. … 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 | Upgrade the wpForo Forum plugin to 3.1.6 or later, which is the vendor-released fix for this issue; the advisory is at https://wpscan.com/vulnerability/1c08e9ba-b68a-4e77-970f-3dc7c7cd74f9/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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