CVE-2023-6553: Backup Migration <= 1.3.7 - Unauthenticated Remote Code Execution
Vulnerability summary
CVE-2023-6553 is a critical (CVSS 9.8) Code Injection vulnerability in backupbliss backup_migration. EPSS estimates a 97.85% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 15-12-2023PublishedVulnerability first disclosed.
- 08-04-2026Last modifiedVulnerability information updated.
Description
The Backup Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.3.7 via the /includes/backup-heart.php file. This is due to an attacker being able to control the values passed to an include, and subsequently leverage that to achieve remote code execution. This makes it possible for unauthenticated attackers to easily execute code on the server.
CVSS metrics
3 scores · 3 sources · 1 version- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- wordfenceSource9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
97.85%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
No change 0.00 pp
From 97.85% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
2 foundWordPress Backup Migration Plugin PHP Filter Chain RCE
exploit/multi/http/wp_backup_migration_php_filter
Maturity: weaponized
WordPress Backup Migration 1.3.7 - Remote Command Execution
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Backupbliss1 product
- backup_migration≤ 1.3.7
Inisev1 product
Wordpress1 product
- backup-backup≤ 1.3.7 (fixed in 1.3.8)
3 vendors · 3 products