What’s Vulnerable › Vulnerabilities

CVE-2021-42549: reflected XSS in search functionality of WP Cloud Plugins - Lets-Box

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-13 · updated 2026-06-17
• Weakness: CWE-79

Description

Insufficient Input Validation in the search functionality of Wordpress plugin Lets-Box prior to 1.15.3 allows unauthenticated user to craft a reflected Cross-Site Scripting attack.

Affected products

• WP Cloud Plugins Lets-Box: before 1.15.3 — fixed in 1.15.3

How to fix

Upgrade to a fixed version: WP Cloud Plugins Lets-Box 1.15.3. Check the vendor advisory for mitigations.

References

• https://www.wpcloudplugins.com/wp-content/plugins/lets-box/_documentation/index.html#releasenotes
• https://www.wpcloudplugins.com/wp-content/plugins/lets-box/_documentation/index.html#releasenotes

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