CVE-2017-18921 is a Cross-Site Scripting (XSS) vulnerability affecting Mattermost Server versions prior to 3.6.0 and 3.5.2, where a malicious link on an error page could execute arbitrary scripts. This medium-severity vulnerability (CVSS 6.1) requires user interaction (UI:R) and network access (AV:N) for exploitation, potentially leading to limited confidentiality and integrity impacts (C:L/I:L). There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, suggesting it is not currently a high-profile threat.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.5.2CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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 0.1 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.
Remediation records are not available for this CVE.