CVE-2021-39325 OptinMonster <= 2.6.0 Reflected Cross-Site Scripting
Attackers can inject arbitrary web scripts via reflected XSS in the OptinMonster WordPress plugin, potentially compromising user sessions.
- 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-2021-39325?
CVE-2021-39325 is a medium-severity cross-site scripting vulnerability in OptinMonster, published on 20 Sep 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
The OptinMonster WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to insufficient input validation in the load_previews function found in the ~/OMAPI/Output.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.6.0.
Weakness: CWE-79
Which versions are affected by CVE-2021-39325?
It affects 1 product.
Products include Optinmonster Optinmonster.
How do I fix CVE-2021-39325?
No fix has been published for CVE-2021-39325 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-2021-39325 being exploited?
There is no known exploitation of CVE-2021-39325 in the wild and no public exploit code.
Other vulnerabilities in OptinMonster
- CVE-2021-39341 OptinMonster <= 2.6.4 Unprotected REST-API Endpoints
- CVE-2023-0772 Popup Builder by OptinMonster < 2.12.2 - Subscriber+ Arbitrary Post Content Disclosure
- CVE-2024-4045 Cross-site scripting in Popup Builder & Popup Maker for WordPress – OptinMonster Email Marketing and Lead Generation
- CVE-2016-10996 Missing authorization in n/a
Sources
Also known as GHSA-q4c3-5fjh-5v6h.