EUVD-2026-87900
GHSA-fx75-253r-968v
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Remote unauthenticated no-interaction AJAX action (AV:N/AC:L/PR:N/UI:N); the persistent author account plus rotatable app password yields authenticated author-scoped read/write, so C:L and I:L, no availability impact.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
Lifecycle Timeline
5DescriptionCVE.org
The Optima Express IDX WordPress plugin before 8.7.6 does not perform any authorisation check on one of its AJAX actions that is available to logged-out users, allowing unauthenticated attackers to force the creation of a fixed author-role account and to repeatedly rotate its application password on any connected install.
AnalysisAI
Unauthenticated remote attackers can force the creation of a fixed author-role WordPress account - and repeatedly rotate that account's application password - on any site running the Optima Express IDX plugin from 8.5.0 up to (but not including) 8.7.6, because one of its AJAX actions lacks any authorization check and is exposed to logged-out users. Exploitation requires no authentication (PR:N), no user interaction (UI:N), and low complexity; publicly available exploit code exists, though CISA's SSVC records no observed exploitation and EPSS is low at 0.14% (3rd percentile). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions beyond the vulnerable plugin being installed: any WordPress site running Optima Express IDX from 8.5.0 up to (not including) 8.7.6 is exploitable by a remote, unauthenticated (PR:N) attacker with no user interaction (UI:N), because one AJAX action is exposed to logged-out users with no authorization check. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a moderate-severity but operationally meaningful missing-authorization flaw (CWE-862), not a high-CVSS-but-low-real-risk paper cut. … 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 Optima Express IDX to 8.7.6 or later - Vendor-released patch: 8.7.6, as confirmed by the WPScan advisory and EUVD; this is the primary and complete fix because it restores the missing authorization check on the AJAX action. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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