CVE-2021-39338 describes a Stored Cross-Site Scripting vulnerability in the MyBB Cross-Poster WordPress plugin, affecting versions up to and including 1.0. This flaw, stemming from insufficient input validation in ~/classes/MyBBXPSettings.php, allows administrative users to inject arbitrary web scripts. Rated Medium severity (CVSS 4.8), the vulnerability requires high privileges and user interaction, with potential impacts on confidentiality and integrity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 1.0CPE matchmatch criteria | cpe:2.3:a:mybb_cross-poster_project:mybb_cross-poster:*:*:*:*:*:wordpress:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.