XSS in Quantumcloud Simple Link Directory
CVE-2026-53742
Simple Link Directory through 9.0.4 echoes embed shortcode attributes into HTML data attributes without escaping in the embedder template. Attackers with contributor access can craft a shortcode attribute that injects an event handler executing in a viewer's browser.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (12.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Quantumcloud Simple Link Directory — versions 0
Weakness classification (CWE)
References
- wordpress.org/plugins/simple-link-directory/ (product)
- www.vulncheck.com/advisories/simple-link-directory-through-stored-xss-via-embed… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-53742?
- CVE-2026-53742 is a medium-severity vulnerability in Quantumcloud Simple Link Directory, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-10.
- How severe is CVE-2026-53742?
- Medium severity. CVSS v3 base score is 5.4 out of 10.