CVE-2018-21264 describes a critical vulnerability in Mattermost Server versions prior to 4.7.0, 4.6.2, and 4.5.2, where the system failed to enforce the expiration date of SAML responses. This flaw carries a high CVSS score of 8.8, indicating that an authenticated attacker could remotely exploit this weakness with low complexity to achieve high impact on confidentiality, integrity, and availability. While no active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion has been observed, the vulnerability's severity warrants immediate patching.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.5.2CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | ||
>= 4.6.0, < 4.6.2CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | ||
4.7.0CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:4.7.0:rc1:*:*:*:*:*:* | ||
4.7.0CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:4.7.0:rc2:*:*:*:*:*:* | ||
4.7.0CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:4.7.0:rc3:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
Remediation records are not available for this CVE.