CVE-2021-36877

Listing, Classified Ads & Business Directory – uListing <= 2.0.5 - Cross-Site Request Forgery

2021-07-27 04:34

Strategic Overview

Status: Patched in 2.0.6
Affected Plugin: Directory Listings WordPress plugin – uListing
Affected Version: <= 2.0.5
CVSS: 6.5Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2021-36877

View all Directory Listings WordPress plugin – uListing vulnerabilities

At a glance

CVE-2021-36877 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Directory Listings WordPress plugin WordPress plugin, affecting versions <= 2.0.5. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high integrity impact). Exploitation requires no authentication. The issue is fixed in version 2.0.6; sites on affected versions should update now. Disclosed July 2021, reported by R3N0.

Vulnerability Overview

Cross-Site Request Forgery (CSRF) vulnerability in WordPress uListing plugin (versions <= 2.0.5) makes it possible for attackers to modify user roles.

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 integrity.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Directory Listings WordPress plugin <= 2.0.5 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 Directory Listings WordPress plugin the fix is 2.0.6: builds <= 2.0.5 are affected, anything from 2.0.6 onward is not.

Remediation

Update to version 2.0.6, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Directory Listings WordPress plugin: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Directory Listings WordPress plugin 2.0.6 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-36877 https://www.wordfence.com/threat-intel/vulnerabilities/id/b0eba1e2-d34e-4164-a7cb-55148d308439 https://nvd.nist.gov/vuln/detail/CVE-2021-36877

Related records

Same weakness class

Other vulnerabilities in Directory Listings WordPress plugin – uListing

CVSS Vector

6.5

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone

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