PatchSiren cyber security CVE debrief
CVE-2026-53741 quantumcloud CVE debrief
CVE-2026-53741 is a stored cross-site scripting (XSS) vulnerability in the Simple Link Directory plugin through version 9.0.4. The vulnerability occurs because the plugin interpolates the sld_no_results_found option into a JavaScript string literal without proper encoding. Specifically, the sanitize_text_field function leaves quotes intact, allowing a stored payload to break out of the string and execute script for every page visitor. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 5.1, indicating a MEDIUM severity level. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.
- 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, particularly those who allow user input or manage directory listings, should be aware of this vulnerability. The vulnerability requires a low-privileged user to inject malicious payload, which then affects all visitors to the pages displaying the directory.
Technical summary
The vulnerability is caused by inadequate encoding of user-input data (sld_no_results_found option) into JavaScript string literals. The sanitize_text_field function does not remove quotes, allowing attackers to inject and execute arbitrary JavaScript code.
Defensive priority
MEDIUM
Recommended defensive actions
- Update Simple Link Directory to a version beyond 9.0.4 if available.
- Validate and sanitize all user inputs, especially those reflected in JavaScript contexts.
- Implement Content Security Policy (CSP) to mitigate XSS attacks.
- Regularly review and update plugins and themes to prevent exploitation of known vulnerabilities.
Evidence notes
Evidence suggests that the vendor of the Simple Link Directory plugin is likely the WordPress community, given the reference to the WordPress plugin directory.
Official resources
CVE-2026-53741 was published on 2026-06-10T22:17:02.503Z and modified on 2026-06-11T15:22:26.633Z.