CVE detail
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 cryptographic key between UCenter integration and the database backup API exposed by dbbak.php. Attackers can inject a crafted payload through the username parameter during login to abuse the encryption oracle in logging_ctl::logging_more(), obtain a legitimately signed token, and use it to bypass authorization for database export and import operations, with the additional ability to trigger a race condition to impersonate arbitrary users.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 17.9 · diversity 9.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
5 source links · newest first
- http://seclists.org/fulldisclosure/2026/Jun/3seclists.org
No excerpt available.
Exploitseclists.orgJun 15, 2026, 8:16 PM - https://www.vulncheck.com/advisories/discuz-x5-0-authentication-bypass-via-dbbak-php-encryption-oraclewww.vulncheck.com
No excerpt available.
Exploitwww.vulncheck.comJun 15, 2026, 8:16 PM No excerpt available.
Exploitkarmainsecurity.comJun 15, 2026, 8:16 PM- https://karmainsecurity.com/KIS-2026-09karmainsecurity.com
No excerpt available.
Exploitkarmainsecurity.comJun 15, 2026, 8:16 PM No excerpt available.
Exploitgitee.comJun 15, 2026, 8:16 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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