CVE-2026-14603 WowOptin: Next-Gen Popup Maker vulnerability
The WowOptin: Next-Gen Popup Maker WordPress plugin before 1.4.38 does not have proper authorization on a REST endpoint, allowing unauthenticated users to disable all of the site's opt-in forms and insert new template-based opt-in rows into the database.
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Unknown WowOptin: Next-Gen Popup Maker should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- < 1.4.38
Fixed versions
- Apply the latest vendor-supported patched version.
How to fix it
CVE-2026-14603 affects WowOptin: Next-Gen Popup Maker and involves authorization failure. Successful exploitation may let a lower-privileged user view or change data outside their allowed scope. Treat this as a high-priority fix, especially when the affected component or endpoint is reachable by untrusted users. Upgrade WowOptin: Next-Gen Popup Maker to 1.4.38 or a later vendor-supported fixed release.
- Inventory every deployment, device, package, plugin, container, build, and environment that uses WowOptin: Next-Gen Popup Maker.
- Compare the installed version with the recorded affected range: < 1.4.38.
- Upgrade WowOptin: Next-Gen Popup Maker to 1.4.38 or a later vendor-supported fixed release.
- Until patched, disable the affected WowOptin: Next-Gen Popup Maker feature or plugin and restrict its public and administrator endpoints.
- Review configuration, roles, tokens, network paths, and exposed endpoints connected to WowOptin: Next-Gen Popup Maker; remove access that is not required.
- Review authentication, API, audit, and object-change logs for cross-user access, bypassed checks, or unexpected privileged actions.
- If exploitation is suspected, isolate affected assets, preserve evidence, rotate exposed credentials or keys, restore trusted data, and rebuild compromised systems before returning them to service.
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Verify the fix
- Confirm every affected asset now runs the fixed vendor-supported release or has the documented mitigation for CVE-2026-14603 in place.
- Use a safe regression test to confirm the affected authorization failure path no longer produces the vulnerable behavior.
- Confirm temporary access controls, endpoint restrictions, network blocks, and least-privilege settings remain effective after the update.
- Review post-remediation logs and rerun Fixnx plus the relevant package, dependency, firmware, browser, or product-specific security check.
- Document affected assets, versions, changes, validation evidence, reviewed logs, and any credential rotation, cleanup, or replacement completed.
Related categories
Related security risks
More published guidance from the same primary category.
Trusted references
FAQ
What is affected by CVE-2026-14603?
Unknown WowOptin: Next-Gen Popup Maker versions listed as affected should be reviewed: < 1.4.38.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.