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Adobe CVE-2026-21331

| EUVDEUVD-2026-22657 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-04-14 adobe GHSA-vhf9-597v-53mq
6.1
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.1 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Analysis Generated
Apr 14, 2026 - 19:43 vuln.today
EUVD ID Assigned
Apr 14, 2026 - 18:01 euvd
EUVD-2026-22657
Analysis Generated
Apr 14, 2026 - 18:01 vuln.today
CVE Published
Apr 14, 2026 - 17:33 nvd
MEDIUM 6.1

DescriptionCVE.org

Adobe Connect versions 2025.3, 12.10 and earlier are affected by a reflected Cross-Site Scripting (XSS) vulnerability. If an attacker is able to convince a victim to visit a URL referencing a vulnerable page, malicious JavaScript content may be executed within the context of the victim's browser. Scope is changed.

AnalysisAI

Reflected cross-site scripting (XSS) in Adobe Connect 2025.3, 12.10, and earlier allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser via a crafted URL, potentially compromising user session data and performing actions on behalf of the victim. The vulnerability affects multiple versions across a wide product scope and requires user interaction (clicking a malicious link) to trigger. No public exploit code or active exploitation has been confirmed at the time of analysis.

Technical ContextAI

This vulnerability is a classic reflected XSS flaw (CWE-79) in the Adobe Connect web application, a collaborative communication platform. The vulnerability occurs because user-supplied input from URL parameters is rendered into the HTML response without proper sanitization or output encoding. Adobe Connect is a multi-user web-based platform handling sensitive meeting and collaboration data; XSS flaws in such applications are particularly dangerous because they operate within the authenticated session context of the victim, allowing an attacker to bypass normal access controls. The reflected (non-persistent) nature means the malicious payload must be embedded in the URL itself, limiting the attack surface compared to stored XSS but still enabling targeted phishing campaigns.

RemediationAI

Upgrade Adobe Connect to a patched version released after 12.10 and 2025.3. Consult Adobe's security bulletin APSB26-37 at https://helpx.adobe.com/security/products/connect/apsb26-37.html for the exact fixed version and availability timeline. As a temporary mitigation pending patching, restrict URL sharing from untrusted sources, educate users not to click suspicious links referencing Adobe Connect URLs, and consider implementing content security policy (CSP) headers to restrict inline script execution if feasible within your infrastructure.

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CVE-2026-21331 vulnerability details – vuln.today

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