CVE-2021-24322: Database Backup for WordPress < 2.4 - Authenticated Persistent Cross-Site Scripting (XSS)

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-01 · updated 2026-06-17
Weakness: CWE-79

Description

The Database Backup for WordPress plugin before 2.4 did not escape the backup_recipient POST parameter in before output it back in the attribute of an HTML tag, leading to a Stored Cross-Site Scripting issue.

Affected products

Database Backup for WordPress: before 2.4 — fixed in 2.4

How to fix

Upgrade to a fixed version: Database Backup for WordPress 2.4. Check the vendor advisory for mitigations.

References

https://m0ze.ru/vulnerability/%5B2021-04-04%5D-%5BWordPress%5D-%5BCWE-79%5D-WP-DB-Backup-WordPress-Plugin-v2.3.3.txt
https://wpscan.com/vulnerability/6bea6301-0762-45c3-a4eb-15d6ac4f9f37
https://m0ze.ru/vulnerability/%5B2021-04-04%5D-%5BWordPress%5D-%5BCWE-79%5D-WP-DB-Backup-WordPress-Plugin-v2.3.3.txt
https://wpscan.com/vulnerability/6bea6301-0762-45c3-a4eb-15d6ac4f9f37

Get alerted when CVE-2021-24322 or the next vulnerability affects your stack