CVE-2023-47790

Pz-LinkCard <= 2.5.2 - Cross-Site Request Forgery via page_cacheman

2023-11-14 00:00

Strategic Overview

Status: Patched in 2.5.3
Affected Plugin: Pz-LinkCard
Affected Version: <= 2.5.2
CVSS: 5.4Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2023-47790

At a glance

CVE-2023-47790 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Pz-LinkCard WordPress plugin, affecting versions <= 2.5.2. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.5.3; sites on affected versions should update now. Disclosed November 2023, reported by Le Ngoc Anh.

Vulnerability Overview

The Pz-LinkCard plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.5.2. This is due to missing or incorrect nonce validation on the page_cacheman function. This makes it possible for unauthenticated attackers to manage the plugin's caching functionality 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)

Reaching this weakness in Pz-LinkCard <= 2.5.2 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 Pz-LinkCard the fix is 2.5.3: builds <= 2.5.2 are affected, anything from 2.5.3 onward is not.

Remediation

Update to version 2.5.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Pz-LinkCard: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Pz-LinkCard 2.5.3 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-47790 https://www.wordfence.com/threat-intel/vulnerabilities/id/b6de97ac-127d-47ec-8b74-03e7fa4932f6 https://nvd.nist.gov/vuln/detail/CVE-2023-47790

Related records

Other vulnerabilities in Pz-LinkCard

CVSS Vector

5.4

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

Base

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

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