WordPress users beware! CVE-2024-3241 looms over Ultimate Blocks, exposing a Stored XSS vulnerability that enables admin account creation. This threat, originating from a seemingly harmless plugin, demands immediate attention to safeguard your website’s integrity.
| CVE | CVE-2024-3241 | |
| Plugin | Ultimate Blocks < 3.1.7 | |
| Critical | High | |
| All Time | 1 324 928 | |
| Active installations | 50 000+ | |
| Publicly Published | April 15, 2023 | |
| Last Updated | April 15, 2023 | |
| Researcher | Dmtirii Ignatyev | |
| OWASP TOP-10 | A7: Cross-Site Scripting (XSS) | |
| PoC | Yes | |
| Exploit | No | |
| Reference | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-3241 https://wpscan.com/vulnerability/a645daee-42ea-43f8-9480-ef3be69606e0/ | |
| Plugin Security Certification by CleanTalk |  | |
| Logo of the plugin |  |
Timeline
| April 1, 2024 | Plugin testing and vulnerability detection in the Ultimate Blocks have been completed |
| April 1, 2024 | I contacted the author of the plugin and provided a vulnerability PoC with a description and recommendations for fixing |
| April 15, 2024 | Registered CVE-2024-3241 |
Discovery of the Vulnerability
During meticulous plugin testing, a critical flaw was unearthed within Ultimate Blocks. It permits contributors to execute Stored XSS attacks, paving the path for admin account takeover. The vulnerability was identified amidst routine security assessments, underlining the importance of robust testing protocols.
Understanding of Stored XSS attack’s
Stored XSS, a prevalent cyber threat, allows attackers to inject malicious scripts into web applications. In WordPress, such vulnerabilities often lurk within plugins, leveraging user input fields to execute unauthorized code. Real-world incidents underscore the severity of these exploits, showcasing their potential to wreak havoc on unsuspecting websites.
Exploiting the Stored XSS Vulnerability
Stored XSS, a prevalent cyber threat, allows attackers to inject malicious scripts into web applications. In WordPress, such vulnerabilities often lurk within plugins, leveraging user input fields to execute unauthorized code. Real-world incidents underscore the severity of these exploits, showcasing their potential to wreak havoc on unsuspecting websites.
POC:
Create a new Post and add “Advanced Heading” block. Change “level” field to img src=x onerror=alert(1)
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The ramifications of CVE-2024-3241 extend far beyond website compromise. From data breaches to reputation damage, businesses face dire consequences in the event of an attack. Malicious actors could exploit the vulnerability to infiltrate WordPress sites, exfiltrate sensitive information, or deploy further exploits, amplifying the threat landscape.
Recommendations for Improved Security
To mitigate the risk posed by CVE-2024-3241, users are urged to update Ultimate Blocks to the latest secure version immediately. Additionally, robust security measures, such as regular plugin audits, stringent input validation, and proactive threat monitoring, are essential to fortify WordPress sites against evolving cyber threats. Stay vigilant, stay secure!
By taking proactive measures to address Stored XSS vulnerabilities like CVE-2024-3241, WordPress website owners can enhance their security posture and safeguard against potential exploitation. Stay vigilant, stay secure.
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DMITRII I.
