Vulnerability in Discuz! X5.0
CVE-2026-49952
Discuz! X5.0 releases 20260320 through 20260501 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to gain unauthorized access to database backup and restore functionality by exploiting a shared cr…
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Discuz! X5.0 — versions 20260320
Weakness classification (CWE)
References
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-49952?
- CVE-2026-49952 is a critical-severity vulnerability in Discuz! X5.0, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 9.1/10. Published 2026-06-15.
- How severe is CVE-2026-49952?
- Critical severity. CVSS v3 base score is 9.1 out of 10.