CVE-2025-31478 is a high-severity vulnerability affecting Zulip and Zulip Server versions prior to 10.2. It allows unauthorized account creation in organizations configured for SSO-only authentication without requiring valid SSO credentials, bypassing intended access controls. The vulnerability has a CVSS score of 8.2 (HIGH) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, with some impact on integrity. There is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 10.2CPE matchmatch criteria | cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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.