CVE-2021-39341 is a high-severity vulnerability affecting the OptinMonster WordPress plugin, versions up to and including 2.6.4. It allows for sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation in the logged_in_or_has_api_key function, potentially enabling malicious web script injection. With a CVSS score of 8.2 (HIGH) and an EPSS score indicating high exploitability, the vulnerability can be exploited remotely without authentication and with low complexity, leading to high confidentiality impact and low integrity impact. While not listed in CISA's KEV catalog, Nuclei templates exist for detecting this vulnerability, and it has garnered significant community discussion and media coverage, including an article from BleepingComputer.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.6.4CPE matchmatch criteria | cpe:2.3:a:optinmonster:optinmonster:*:*:*:*:*:wordpress:*:* | ||
>= 2.6.4, <= 2.6.4CPE match | cpe:2.3:a:optinmonster:optinmonster:*:*:*:*:*:wordpress:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.