CVE-2023-4189 Cross-site Scripting (XSS) - Reflected in instantsoft/icms2
Attackers can execute arbitrary scripts in victim browsers via reflected XSS in InstantCMS, potentially leading to session hijacking or data theft.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-4189?
CVE-2023-4189 is a medium-severity cross-site scripting vulnerability in instantsoft/icms2, published on 5 Aug 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Cross-site Scripting (XSS) - Reflected in GitHub repository instantsoft/icms2 prior to 2.16.1-git.
Weakness: CWE-79
Which versions are affected by CVE-2023-4189?
It affects 1 product.
Products include Instantcms Instantcms.
How do I fix CVE-2023-4189?
No fix has been published for CVE-2023-4189 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-2023-4189 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-4189 exists.
Other vulnerabilities in instantsoft/icms2
- CVE-2023-4188 SQL Injection in instantsoft/icms2
- CVE-2013-10051 InstantCMS <= 1.6 Remote PHP Code Execution
- CVE-2023-4704 External Control of System or Configuration Setting in instantsoft/icms2
- CVE-2026-28281 InstantCMS has Multiple CSRF Vulnerabilities
- CVE-2023-4652 Cross-site Scripting (XSS) - Stored in instantsoft/icms2
Sources
Also known as GHSA-cx85-vw9h-mf4j.