Arbitrary file upload in Thrive Themes Focusblog By
CVE-2021-24220
Thrive “Legacy” Rise by Thrive Themes WordPress theme before 2.0.0, Luxe by Thrive Themes WordPress theme before 2.0.0, Minus by Thrive Themes WordPress theme before 2.0.0, Ignition by Thrive Themes WordPress theme before 2.0.0, FocusBlog by Thrive Themes WordPress theme before 2.0.0, Squared by Thrive Themes WordPress theme before 2.0.0, Voice WordPress theme before 2.0.0, Performag by Thrive Themes WordPress theme before 2.0.0, Pressive by Thrive Themes WordPress theme before 2.0.0, Storied by Thrive Themes WordPress theme before 2.0.0 register a REST API endpoint to compress images using the Kraken image optimization engine. By supplying a crafted request in combination with data inserted using the Option Update vulnerability, it was possible to use this endpoint to retrieve malicious code from a remote URL and overwrite an existing file on the site with it or create a new file.This includes executable PHP files that contain malicious code.
Vulnerability class: Unrestricted File Upload
EPSS: 0.039 (89.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
Affected products
- Thrive Themes Focusblog By — versions 2.0.0
- Thrive Themes Ignition By — versions 2.0.0
- Thrive Themes Luxe By — versions 2.0.0
- Thrive Themes Minus By — versions 2.0.0
- Thrive Themes Performag By — versions 2.0.0
- Thrive Themes Pressive By — versions 2.0.0
- Thrive Themes Rise By — versions 2.0.0
- Thrive Themes Squared By — versions 2.0.0
- Thrive Themes Storied By — versions 2.0.0
- Thrive Themes Voice — versions 2.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- contact@wpscan.com (Third Party Advisory, x_refsource_MISC)
- contact@wpscan.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-24220?
- CVE-2021-24220 is a critical-severity vulnerability in Thrive Themes Focusblog By, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.1/10. Published 2021-04-12.
- How severe is CVE-2021-24220?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-24220 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.