CVE-2021-24155

Backup Guard < 1.6.0 - Authenticated Arbitrary File Upload

Severity Score

7.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The WordPress Backup and Migrate Plugin – Backup Guard WordPress plugin before 1.6.0 did not ensure that the imported files are of the SGBP format and extension, allowing high privilege users (admin+) to upload arbitrary files, including PHP ones, leading to RCE.

El plugin WordPress Backup and Migrate - Backup Guard WordPress antes de la versión 1.6.0 no garantizaba que los archivos importados tuvieran el formato y la extensión SGBP, lo que permitía a los usuarios con altos privilegios (admin+) subir archivos arbitrarios, incluidos los de PHP, lo que provocaba un RCE

*Credits: Nguyen Van Khanh - SunCSR (Sun* Cyber Security Research)

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-14 CVE Reserved
2021-02-18 CVE Published
2021-07-05 First Exploit
2024-08-03 CVE Updated
2025-01-23 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-434: Unrestricted Upload of File with Dangerous Type

CAPEC

References (8)

URL	Tag	Source
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=2473510%40backup&old=2472212%40backup&sfp_email=&sfph_mail=

URL	Date	SRC
https://packetstorm.news/files/id/163382	2021-07-05
https://packetstorm.news/files/id/163623	2021-07-21
https://www.exploit-db.com/exploits/50093	2021-07-05
https://github.com/0dayNinja/CVE-2021-24155.rb	2021-07-30
http://packetstormsecurity.com/files/163382/WordPress-Backup-Guard-1.5.8-Shell-Upload.html	2024-08-03
http://packetstormsecurity.com/files/163623/WordPress-Backup-Guard-Authenticated-Remote-Code-Execution.html	2024-08-03
https://wpscan.com/vulnerability/d442acac-4394-45e4-b6bb-adf4a40960fb	2024-08-03

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Backup-guard Search vendor "Backup-guard"		Backup Guard Search vendor "Backup-guard" for product "Backup Guard"				< 1.6.0 Search vendor "Backup-guard" for product "Backup Guard" and version " < 1.6.0"		wordpress		Affected