CVE-2026-49952 Details.
Discuz! X5.0 - Authentication Bypass
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-49952. What It Means.
Discuz! X5.0 20260320 through 20260501 contains an authentication bypass caused by exploitation of a shared cryptographic key and encryption oracle in dbbak.php and logging_ctl::logging_more(), letting unauthenticated remote attackers access database backup and restore functions, exploit requires crafted payload injection via username parameter.
Affected Product. What Is Hit.
- Vendor
- discuz
- Product
- Discuz X
FAQ
Common Questions.
Discuz! X5.0 - Authentication Bypass. Discuz! X5.0 20260320 through 20260501 contains an authentication bypass caused by exploitation of a shared cryptographic key and encryption oracle in dbbak.php and logging_ctl::logging_more(), letting unauthenticated remote attackers access database backup and restore functions, exploit requires crafted payload injection via username parameter.
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-49952 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-49952 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update Discuz X to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-49952. Atlas does not run a check for it, so nothing here says whether a particular site is affected.