XSS in Adobe Connect
CVE-2026-121904
Adobe Connect is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim's browser when they browse to the page containing the vulnerable field, potentially gaining elevated access or control over the victim's account or session. Scope is changed.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.adobe.com/trust/security/products/connect/apsb26-191.html (vendor-advisory)
Frequently asked questions
- What is CVE-2026-121904?
- CVE-2026-121904 is a critical-severity vulnerability in Adobe Connect, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2026-11-10.
- How severe is CVE-2026-121904?
- Critical severity. CVSS v3 base score is 9.6 out of 10.