What is CVE-2026-21331?

CVE-2026-21331 is a medium-severity vulnerability in Adobe Connect, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-14.

How severe is CVE-2026-21331?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Adobe Connect

CVE-2026-21331

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 m…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (24.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Adobe Connect — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

helpx.adobe.com/security/products/connect/apsb26-37.html (vendor-advisory)

Frequently asked questions

What is CVE-2026-21331?: CVE-2026-21331 is a medium-severity vulnerability in Adobe Connect, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-14.
How severe is CVE-2026-21331?: Medium severity. CVSS v3 base score is 6.1 out of 10.