Smartcat Translator for WPML: Denial of service

Smartcat Translator for WPML is affected by denial of service. The vulnerable path is reachable without authentication. A successful request can exhaust or disrupt the affected operation and make site functionality unavailable. The published affected range is <= 3.1.77.

CVE / CNA score 6.5 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Smartcat Translator for WPML
Plugin slug: smartcat-wpml
Affected: <= 3.1.77
Safe version: See mitigation notes
Published: May 15, 2026
Weakness: CWE-862 — Missing Authorization

This CVE was published May 15, 2026 and is one of 2 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified. Update Smartcat Translator for WPML when a release after 3.1.77 becomes available; until then, disable and remove it when the site's risk warrants. The official upstream changelog lists version 3.1.78, which is newer than the published affected range. Its changelog does not clearly confirm this specific fix, so it is not counted as a known-safe release.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Smartcat Translator for WPML plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'routeData' REST endpoint in all versions up to, and including, 3.1.77. This makes it possible for unauthenticated attackers to overwrite the plugin's Smartcat API credentials (account ID, API secret key, hub key, API host, and hub host), effectively hijacking the translation service or causing a denial of service.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

Primary and upstream sources

Data attribution: This product uses the NVD API but is not endorsed or certified by the NVD.

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