CVE-2021-39207 is a critical YAML deserialization vulnerability affecting Facebook's ParlAI framework, which allows for arbitrary code execution due to unsafe loading practices. With a CVSS score of 8.8 (High), this vulnerability can be exploited remotely with low complexity and user interaction, leading to high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or significant community discussion, users are strongly advised to upgrade to ParlAI version 1.1.0 or later, or implement the recommended workaround of using SafeLoader.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.1.0CPE matchmatch criteria | cpe:2.3:a:facebook:parlai:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.