a3 Responsive Slider <= 2.1.0 - Cross-Site Request Forgery to Stored Cross-Site Scripting
Strategic Overview
- Status
- Patched in 2.2.0
- Affected Plugin
- a3 Responsive Slider
- Affected Version
<= 2.1.0- CVSS
- 9.6Critical
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE pending
At a glance
This record tracks a critical-severity Cross-Site Request Forgery (CSRF) vulnerability in the a3 Responsive Slider WordPress plugin, affecting versions <= 2.1.0. It carries a CVSS score of 9.6 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 2.2.0; sites on affected versions should update now. Disclosed June 2022.
Vulnerability Overview
The a3 Responsive Slider plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.1.0. This is due to missing or incorrect nonce validation on the slider_form_action function. This makes it possible for unauthenticated attackers to inject malicious JavaScript, that will execute whenever a user accesses an injected page, via 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. 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 a3 Responsive Slider <= 2.1.0 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 a3 Responsive Slider the fix is 2.2.0: builds <= 2.1.0 are affected, anything from 2.2.0 onward is not.
Remediation
Update to version 2.2.0, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to a3 Responsive Slider: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: a3 Responsive Slider 2.2.0 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
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