CVE-2021-21809 is a critical command execution vulnerability affecting Moodle 3.10's default legacy spellchecker plugin. An attacker with administrator privileges can exploit this by sending specially crafted HTTP requests, leading to full system compromise. With a CVSS score of 9.1 and an EPSS percentile of 0.72129, this vulnerability presents a significant risk, despite requiring high privileges for exploitation. While not observed in active exploitation, a Metasploit module exists, indicating readily available exploit code, though community discussion and media coverage remain low.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
3.10.0CPE matchmatch criteria | cpe:2.3:a:moodle:moodle:3.10.0:-:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:L
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.7 Bluesky, 0.4 Mastodon, and 1.7 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.