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CVE-2023-6553

93
FAUCET Score

CVE-2023-6553 is a critical Remote Code Execution (RCE) vulnerability affecting all versions up to 1.3.7 of the Backup Migration plugin for WordPress, impacting approximately 90,000 sites. With a CVSS score of 9.8, it allows unauthenticated attackers to easily execute arbitrary code on the server due to controllable values passed to an include function. This vulnerability is actively exploited, with publicly available Metasploit modules and Nuclei templates, and has garnered significant community discussion and media coverage, indicating widespread awareness and potential for active exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.7CPE matchmatch criteria
cpe:2.3:a:backupbliss:backup_migration:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
97.85%
Probability of exploitation in next 30 days
EPSS Percentile
99.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: WordPress Backup Migration Plugin PHP Filter Chain RCE · Dec 11, 2023
Nuclei: CVE-2023-6553 · Dec 14, 2023
ExploitDB: EDB-52486 · Mar 3, 2026
This CVE's current EPSS score of 0.9785 is in the 99th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/176638/WordPress-Backup-Migration-1.3.7-Remote-Command-Execution.html
plugins.trac.wordpress.org / browser/backup-backup/tags/1.3.7/includes/backup-heart.php
Patch
plugins.trac.wordpress.org / browser/backup-backup/tags/1.3.7/includes/backup-heart.php
Patch
plugins.trac.wordpress.org / browser/backup-backup/tags/1.3.7/includes/backup-heart.php
Patch
plugins.trac.wordpress.org / browser/backup-backup/tags/1.3.7/includes/backup-heart.php
Patch
plugins.trac.wordpress.org / changeset
Patch
synacktiv.com / en/publications/php-filters-chain-what-is-it-and-how-to-use-it
Not Applicable
wordfence.com / threat-intel/vulnerabilities/id/3511ba64-56a3-43d7-8ab8-c6e40e3b686e
Third Party Advisory