CVE-2021-47737 CSZ CMS 1.2.7 HTML Injection Vulnerability via Member Dashboard
Authenticated users can inject malicious HTML links into message titles, enabling phishing or social engineering attacks against other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47737?
CVE-2021-47737 is a medium-severity cross-site scripting vulnerability in Cszcms CSZ CMS, published on 23 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
CSZ CMS 1.2.7 contains an HTML injection vulnerability that allows authenticated users to insert malicious hyperlinks in message titles. Attackers can craft POST requests to the member messaging system with HTML-based links to potentially conduct phishing or social engineering attacks.
Weakness: CWE-79
Which versions are affected by CVE-2021-47737?
It affects 1 product.
Products include Cszcms Csz Cms.
How do I fix CVE-2021-47737?
No fix has been published for CVE-2021-47737 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-2021-47737 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47737 exists.
Other vulnerabilities in Cszcms CSZ CMS
Sources
Also known as GHSA-96ph-5762-cph5.