CVE-2021-28363 is a medium-severity vulnerability affecting urllib3 library versions 1.26.x before 1.26.4, as well as various Fedora and Oracle products utilizing it. The flaw involves a critical omission of SSL certificate hostname validation when connecting to HTTPS proxies, potentially allowing an attacker to intercept or redirect traffic if a valid, but incorrect, certificate is presented. With a CVSS score of 6.5, this network-based vulnerability requires no user interaction and could lead to low confidentiality and integrity impacts. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.26.0, < 1.26.4CPE matchmatch criteria | cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
8.59CPE matchmatch criteria | cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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.