PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-53742 quantumcloud CVE debrief

CVE-2026-53742 is a Medium severity vulnerability (CVSS Score: 5.1) in the Simple Link Directory plugin through version 9.0.4 for WordPress. The plugin echoes embed shortcode attributes into HTML data attributes without proper escaping in the embedder template. This allows attackers with contributor access to craft a shortcode attribute that injects an event handler executing in a viewer's browser, enabling a stored cross-site scripting (XSS) attack.

Vendor
quantumcloud
Product
Simple Link Directory
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-11
Advisory published
2026-06-10
Advisory updated
2026-06-11

Who should care

Users of the Simple Link Directory plugin for WordPress, particularly those with contributor access, should be aware of this vulnerability. The vulnerability was made public on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-53742) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-53742).

Technical summary

The Simple Link Directory plugin through version 9.0.4 for WordPress is vulnerable to stored cross-site scripting (XSS) via embed shortcode attributes. The plugin does not properly escape embed shortcode attributes in the embedder template, allowing contributors to inject malicious event handlers that execute in the browser of viewers who interact with the affected content.

Defensive priority

Medium

Recommended defensive actions

  • Update the Simple Link Directory plugin to a version beyond 9.0.4 if available.
  • Restrict contributor access to minimize the attack surface.
  • Monitor for suspicious shortcode usage and injected scripts.

Evidence notes

Evidence suggests the vendor is likely WordPress, based on the plugin's presence in the WordPress ecosystem [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53742 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53742

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53742 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53742

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.