CVE-2021-40721 Explained : Impact and Mitigation

Adobe Connect version 11.2.3 (and earlier) is affected by a reflected Cross-Site Scripting (XSS) vulnerability.

Understanding CVE-2021-40721

Adobe Connect has a security vulnerability that allows malicious JavaScript content to be executed in a victim's browser.

What is CVE-2021-40721?

CVE ID: CVE-2021-40721
Product: Adobe Connect
Vendor: Adobe
Vulnerability Type: Cross-Site Scripting (Reflected XSS)
CVSS Base Score: 6.1 (Medium)
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

The Impact of CVE-2021-40721

Attack Complexity: Low
Attack Vector: Network
Scope: Changed
User Interaction: Required
Confidentiality and Integrity Impact: Low
Privileges Required: None
Availability Impact: None
When exploited, an attacker can execute malicious scripts in the victim's browser.

Technical Details of CVE-2021-40721

Adobe Connect version 11.2.3 (and earlier) is affected by a reflected Cross-Site Scripting (XSS) vulnerability.

Vulnerability Description

Affects Adobe Connect versions <= 11.2.3
Allows execution of malicious JavaScript content

Affected Systems and Versions

Product: Adobe Connect
Versions: <= 11.2.3
Custom Version: Unspecified

Exploitation Mechanism

Attacker convinces victim to visit a URL referencing a vulnerable page
Malicious JavaScript is executed in victim's browser context

Mitigation and Prevention

Adobe has provided the following information to mitigate the impact of CVE-2021-40721.

Immediate Steps to Take

Update Adobe Connect to a non-affected version
Avoid clicking on untrusted URLs

Long-Term Security Practices

Regularly update software to the latest versions
Educate users on safe browsing practices

Patching and Updates

Adobe released a security update for Adobe Connect to address this vulnerability.