XSS in Svg Support
CVE-2026-13340
The SVG Support WordPress plugin before 2.5.17 does not apply its SVG sanitisation to uploaded files using the .svgz extension, even though it registers and serves them as SVG, allowing a user permitted to upload SVGs (such as an Author once granted upload access) to store a script-bearing file that executes in the browser of anyone who later views it, including an administrator.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (7.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Unknown Svg Support — versions 0
Weakness classification (CWE)
References
- contact@wpscan.com (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-13340?
- CVE-2026-13340 is a medium-severity vulnerability in Svg Support, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-03.
- How severe is CVE-2026-13340?
- Medium severity. CVSS v3 base score is 6.1 out of 10.