CVE-2026-21331
Received Received - Intake
Reflected XSS in Adobe Connect Allows Browser-Based Code Execution

Publication date: 2026-04-14

Last updated on: 2026-04-22

Assigner: Adobe Systems Incorporated

Description
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.
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Meta Information
Published
2026-04-14
Last Modified
2026-04-22
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-21331
EUVD
EUVD-2026-22657
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
adobe connect to 12.11 (exc)
adobe connect_desktop_application to 2025.3 (inc)
adobe connect_desktop_application to 2025.9.15 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Compliance Impact

The vulnerability is a reflected Cross-Site Scripting (XSS) issue in Adobe Connect versions 2025.3, 12.10 and earlier, which allows execution of malicious JavaScript in the victim's browser context if they visit a crafted URL.

Such XSS vulnerabilities can potentially lead to unauthorized access to sensitive information or session hijacking, which may impact compliance with data protection regulations like GDPR or HIPAA by compromising confidentiality and integrity of user data.

However, specific impacts on compliance depend on the context of use, data handled, and mitigation measures in place.

Executive Summary

This vulnerability is a reflected Cross-Site Scripting (XSS) issue affecting Adobe Connect versions 2025.3, 12.10, and earlier. It occurs when an attacker tricks a victim into visiting a specially crafted URL that references a vulnerable page. When the victim visits this URL, malicious JavaScript code can be executed within the victim's browser context.

Impact Analysis

The impact of this vulnerability is that an attacker can execute malicious JavaScript code in the victim's browser. This can lead to unauthorized actions such as stealing sensitive information, hijacking user sessions, or performing actions on behalf of the victim without their consent.

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