CVE-2021-31803 Cross-site scripting in n/a
An attacker can execute arbitrary scripts in their own session via EasyApache 4 Save Profile in cPanel, potentially bypassing security controls.
- 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-2021-31803?
CVE-2021-31803 is a medium-severity cross-site scripting vulnerability in Cpanel Cpanel, published on 26 Apr 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
cPanel before 94.0.3 allows self-XSS via EasyApache 4 Save Profile (SEC-581).
Weakness: CWE-79
Which versions are affected by CVE-2021-31803?
It affects 1 product.
Products include Cpanel Cpanel.
How do I fix CVE-2021-31803?
No fix has been published for CVE-2021-31803 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-2021-31803 being exploited?
There is no known exploitation of CVE-2021-31803 in the wild and no public exploit code.
Other vulnerabilities in Cpanel Cpanel
- CVE-2026-41940 WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function
- CVE-2003-1425 guestbook.cgi in cPanel 5.0 allows remote attackers to execute arbitrary commands via the template parameter.
- CVE-2004-1769 Code injection in n/a
- CVE-2004-1770 Command injection in n/a
- CVE-2020-26098 Command injection in n/a
Sources
Also known as GHSA-x578-9p5g-hvj5.