---
id: "CVE-2026-121904"
page: "https://infrastack.ai/live/CVE-2026-121904"
kind: "vulnerability"
aliases: ["CVE-2026-121904"]
title: "Adobe Connect: stored XSS in form fields lets scripts run in victims' browsers"
severity: "critical"
cvss: 9.6
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "Adobe Connect", "fixed": ["12.12.a", "12.11.i", "12.10.f", "12.9.a", "12.8.a"], "affected": "<= 12.12 (Windows)", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["adobe-connect", "self-hosted", "vendor", "windows", "xss"]
not_affected_if: ["unknown"]
published_at: "2026-11-10T22:18:27+00:00"
first_seen_at: "2026-11-10T22:27:27+00:00"
updated_at: "2026-11-10T22:30:34+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121904", "first_seen_at": "2026-11-10T22:27:27+00:00"}, {"source": "analyst", "url": "https://www.adobe.com/trust/security/products/connect/apsb26-191.html", "first_seen_at": "2026-11-10T22:30:34+00:00", "cites": ["https://www.adobe.com/trust/security/products/connect/apsb26-191.html"]}]
exploit_sources: []
---

# Adobe Connect: stored XSS in form fields lets scripts run in victims' browsers

Link for people: https://infrastack.ai/live/CVE-2026-121904 (this .md is for agents)

Adobe Connect has a stored cross-site scripting flaw in some form fields. A low-privileged attacker can save malicious JavaScript that runs in the browser of anyone who opens the affected page, potentially taking over their session or account.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Adobe Connect affected <= 12.12 (Windows) fixed 12.12.a, 12.11.i, 12.10.f, 12.9.a, 12.8.a

## How to check

Check your Adobe Connect server version (Windows, on-prem). Versions 12.12 and earlier without the 12.12.a / 12.11.i / 12.10.f / 12.9.a / 12.8.a update are listed as affected by Adobe in APSB26-191.

## Fix

Update Adobe Connect (Windows) to 12.12.a, 12.11.i, 12.10.f, 12.9.a or 12.8.a (whichever branch you run), per APSB26-191.

## Timeline

- 2026-11-10T22:27:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121904
- 2026-11-10T22:30:34+00:00 analyst https://www.adobe.com/trust/security/products/connect/apsb26-191.html — Read Adobe APSB26-191 (Nov 10 2026): stored XSS, CVSS 9.6, no in-the-wild exploits; bulletin doesn't name the vulnerable fields. Fixed builds per branch listed.

## Documents

- [advisory] APSB26-191 Security update available for Adobe Connect https://www.adobe.com/trust/security/products/connect/apsb26-191.html

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_