CVE-2021-40721 Adobe Connect Reflected Cross Site Scripting
An attacker can execute malicious JavaScript in a victim's browser by tricking them into visiting a crafted URL in Adobe Connect.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-40721?
CVE-2021-40721 is a medium-severity cross-site scripting vulnerability in Adobe Connect, published on 15 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Adobe Connect version 11.2.3 (and earlier) is 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.
Weakness: CWE-79
Which versions are affected by CVE-2021-40721?
It affects 1 product.
Products include Adobe Connect.
How do I fix CVE-2021-40721?
No fix has been published for CVE-2021-40721 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-40721 being exploited?
There is no known exploitation of CVE-2021-40721 in the wild and no public exploit code.
Other vulnerabilities in Adobe Connect
- CVE-2017-11291 Server-side request forgery in Adobe Connect 9.6.2 and earlier versions
- CVE-2026-75682 Adobe Connect | Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (CWE-89)
- CVE-2023-4661 SQLi in Saphira Connect
- CVE-2023-4662 RCE in Saphira Connect
- CVE-2021-40719 Adobe Connect Deserialization of Untrusted Data Remote Code Execution
Sources
Also known as GHSA-fwq9-fc5m-x5cc.