EUVD-2026-36792

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 databa...

CVE-2026-49953

Discuz! X5.0 releases 20260320 through 20260610 contains a CAPTCHA bypass vulnerability that allows unauthenticated remote attackers to defeat challenge controls by exploiting limited complexity and predictable character sets in generated CAPTCHA images. Attackers can train a custom optical...

CVE-2026-49954

Discuz! X5.0 releases 20260320 through 20260610 contain a local file inclusion vulnerability that allows authenticated administrators to execute arbitrary code by importing a specially crafted plugin configuration containing path traversal sequences in the directory attribute. Attackers can trigg...

CVE-2026-49954

Discuz! X5.0 (versions 20260320–20260610) is affected by a Local File Inclusion in the enable_disable.php Plugin Directory, exploitable by authenticated administrators. The vulnerability stems from importing a crafted plugin configuration that uses path traversal in the directory attribute; an ex...

CVE-2026-49954 Discuz! X5.0 Local File Inclusion via enable_disable.php Plugin Directory

Discuz! X5.0 releases 20260320 through 20260610 contain a local file inclusion vulnerability that allows authenticated administrators to execute arbitrary code by importing a specially crafted plugin configuration containing path traversal sequences in the directory attribute. Attackers can trigg...

CVE-2026-49953 Discuz! X5.0 CAPTCHA Bypass via Predictable Character Set

Discuz! X5.0 releases 20260320 through 20260610 contains a CAPTCHA bypass vulnerability that allows unauthenticated remote attackers to defeat challenge controls by exploiting limited complexity and predictable character sets in generated CAPTCHA images. Attackers can train a custom optical...

CVE-2026-49953

Discuz! X5.0 (builds 20260320–20260610) contains a CAPTCHA bypass vulnerability where limited complexity and predictable character sets in generated CAPTCHA images enable unauthenticated remote attackers to reliably predict challenge text via OCR, bypassing protections on login, registration and ...

CVE-2026-49952

Discuz! X5.0 (versions 20260320–20260501) contains an authentication bypass vulnerability in which an attacker can abuse a shared cryptographic key between UCenter integration and the dbbak.php database backup API. By injecting a crafted payload via the login username, an encryption-oracle path i...

CVE-2026-49952 Discuz! X5.0 Authentication Bypass via dbbak.php Encryption Oracle

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 databa...

CVE-2026-49952 Discuz! X5.0 Authentication Bypass via dbbak.php Encryption Oracle

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 databa...

PT-2026-49307

Name of the Vulnerable Software and Affected Versions Discuz! X5.0 versions 20260320 through 20260501 Description An authentication bypass allows unauthenticated remote attackers to gain unauthorized access to database backup and restore functionality. This is possible due to a shared cryptograph...

PT-2026-49308

Discuz! X5.0 releases 20260320 through 20260501 contains a CAPTCHA bypass vulnerability that allows unauthenticated remote attackers to defeat challenge controls by exploiting limited complexity and predictable character sets in generated CAPTCHA images. Attackers can train a custom optical...