CVE-2020-36761

Top 10 <= 2.9.4 - Cross-Site Request Forgery Bypass

2020-09-16 00:00

Strategic Overview

Status: Patched in 2.9.5
Affected Plugin: WebberZone Top 10 — Popular Posts
Affected Version: < 2.9.5
CVSS: 4.3Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2020-36761

View all WebberZone Top 10 — Popular Posts vulnerabilities

At a glance

CVE-2020-36761 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the WebberZone Top 10 WordPress plugin, affecting versions < 2.9.5. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.9.5; sites on affected versions should update now. Disclosed September 2020, reported by Jerome Bruandet.

Vulnerability Overview

The Top 10 plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.10.4. This is due to missing or incorrect nonce validation on the tptn_export_tables() function. This makes it possible for unauthenticated attackers to generate an export of the top 10 table via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

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.

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

WebberZone Top 10 < 2.9.5 carries this weakness at tptn_export_tables(), and reaching it 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 WebberZone Top 10 the fix is 2.9.5: builds < 2.9.5 are affected, anything from 2.9.5 onward is not.

Remediation

Update to version 2.9.5, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to WebberZone Top 10: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WebberZone Top 10 2.9.5 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-36761 https://www.wordfence.com/threat-intel/vulnerabilities/id/f0af86e4-c30b-49e2-ad6a-97a415a74d18 https://nvd.nist.gov/vuln/detail/CVE-2020-36761

Related records

Same weakness class

Other vulnerabilities in WebberZone Top 10 — Popular Posts

CVSS Vector

4.3

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

Base

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

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