What is CVE-2026-1263?

CVE-2026-1263 is a medium-severity vulnerability in Usystemsgmbh Webling, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-10.

How severe is CVE-2026-1263?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Usystemsgmbh Webling

CVE-2026-1263

The Webling plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 3.9.0 due to insufficient input sanitization, insufficient output escaping, and missing capabilities checks in the 'webling_admin_save_form' and 'webling_admin_save_memberlist' functions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject Webling forms and memberlists with arbitrary web scripts that will execute whenever an administrator views the related form or memberlist area of the WordPress admin.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (20.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Usystemsgmbh Webling — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-1263?: CVE-2026-1263 is a medium-severity vulnerability in Usystemsgmbh Webling, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-10.
How severe is CVE-2026-1263?: Medium severity. CVSS v3 base score is 6.4 out of 10.