The WP Database Backup plugin through 5.5 for WordPress stores downloads by default locally in the directory wp-content/uploads/db-backup/. This might allow attackers to read ZIP archives by guessing random ID numbers, guessing date strings with a 2020_{0..1}{0..2}_{0..3}{0..9} format, guessing UNIX timestamps, and making HTTPS requests with the complete guessed URL.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-7241
• https://github.com/V1n1v131r4/Exploiting-WP-Database-Backup-WordPress-Plugin/blob/master/README.md
• https://wordpress.org/plugins/wp-database-backup/#developers
• https://zeroauth.ltd/blog/2020/01/21/analysis-on-cve-2020-7241-misrepresenting-a-security-vulnerability/