Browser and Operating System Finder <= 1.1 - Cross-Site Request Forgery
Strategic Overview
- Status
- Patched in 1.2
- Affected Plugin
- Browser and Operating System Finder
- Affected Version
< 1.2- CVSS
- 8.8High
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2021-20851
At a glance
CVE-2021-20851 is a high-severity Cross-Site Request Forgery (CSRF) vulnerability in the Browser and Operating System Finder WordPress plugin, affecting versions < 1.2. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 1.2; sites on affected versions should update now. Disclosed November 2021, reported by imai shinpei, Tokyo Denki University.
Vulnerability Overview
Cross-site request forgery (CSRF) vulnerability in Browser and Operating System Finder versions prior to 1.2 allows a remote unauthenticated attacker to hijack the authentication of an administrator via unspecified vectors.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-352: Cross-Site Request Forgery (CSRF)
Reaching this weakness in Browser and Operating System Finder < 1.2 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.
An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Browser and Operating System Finder the fix is 1.2: builds < 1.2 are affected, anything from 1.2 onward is not.
Remediation
Update to version 1.2, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Browser and Operating System Finder: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Browser and Operating System Finder 1.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in Browser and Operating System Finder
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C