CVE-2021-21332 is a Cross-Site Scripting (XSS) vulnerability found in the password reset endpoint of Matrix Synapse, affecting versions prior to 1.27.0, including those in Fedora. This high-severity vulnerability (CVSS 8.2) has a network attack vector and low attack complexity, potentially allowing attackers to access cookies, browser data, and facilitate CSRF attacks. While the vulnerability is patched in version 1.27.0, there is no evidence of active exploitation, public exploit code, or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.27.0CPE matchmatch criteria | cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.