CVE-2023-5821

Thumbnail carousel slider <= 1.0 - Cross-Site Request Forgery to Mass Slider Deletion

2023-10-26 00:00

Strategic Overview

Status: Patched in 1.0.1
Affected Plugin: Responsive Thumbnail Slider
Affected Version: 1.0
CVSS: 4.3Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2023-5821

View all Responsive Thumbnail Slider vulnerabilities

At a glance

CVE-2023-5821 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Responsive Thumbnail Slider WordPress plugin, affecting versions 1.0. 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 1.0.1; sites on affected versions should update now. Disclosed October 2023, reported by Ala Arfaoui.

Vulnerability Overview

The Thumbnail carousel slider plugin for WordPress is vulnerable to Cross-Site Request Forgery in version 1.0. This is due to missing nonce validation on the deleteselected function. This makes it possible for unauthenticated attackers to delete sliders in bulk 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 Responsive Thumbnail Slider 1.0 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 Responsive Thumbnail Slider the fix is 1.0.1: builds 1.0 are affected, anything from 1.0.1 onward is not.

Remediation

Update to version 1.0.1, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Responsive Thumbnail Slider: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Responsive Thumbnail Slider 1.0.1 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-5821 https://www.wordfence.com/threat-intel/vulnerabilities/id/bde75c5a-b0b7-4f26-91e9-dd4816e276c9 https://nvd.nist.gov/vuln/detail/CVE-2023-5821

Related records

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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