EUVD-2026-78297
GHSA-mcqc-q4hw-vwgg
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Stored XSS requires a victim to visit the injected page (UI:R corrects official UI:N); PR:L reflects mandatory contributor authentication; S:C and C:L/I:L are standard for cross-user XSS.
Primary rating from Vendor (Wordfence).
CVSS VectorNVD
Lifecycle Timeline
2DescriptionNVD
The Eventin - Event Calendar, Event Registration, Tickets & Booking (AI Powered) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'etn_shedule_objective' schedule_slot Parameter in all versions up to, and including, 4.1.23 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AnalysisAI
Stored Cross-Site Scripting in the Eventin WordPress plugin (all versions up to and including 4.1.23) allows contributor-level authenticated attackers to inject persistent arbitrary JavaScript via the etn_shedule_objective field within the schedule_slot REST API parameter. The injected payload executes in the browsers of any user who subsequently views an affected event schedule page, enabling session hijacking, credential theft, or unauthorized administrative actions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid WordPress user account with contributor-level access or higher on the target installation - unauthenticated exploitation is not possible per the CVSS PR:L metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The official CVSS 6.4 score (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N) captures the medium severity accurately for most environments. … 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 Eventin plugin to the first version above 4.1.23; verify the latest available release in the WordPress plugin directory (wordpress.org/plugins/wp-event-solution) or consult the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/a07070b6-37d2-4ccf-ae81-a08ac7b76241 - an exact confirmed patched version number is not independently available in the current data, so verify before upgrading. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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