Vulnerabilidades de Discuz!
CVEs publicadas que afetam produtos de Discuz!: 3 registro(s), com severidade, exploração e correções.
CVE-2026-49954
Alta · 7.2
CWE-98 15/06/2026
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 trigger an exception during plugin installation to bypass sanitization routines, causing malicious paths to be stored unsanitized and subsequently passed to include(), which combined with file upload functionality escalates to arbitrary code execution in the context of the web server user.
CVE-2026-49953
Média · 6.5
CWE-804 15/06/2026
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 character recognition model against collected CAPTCHA samples to reliably predict challenge text, bypassing protections on login, registration, and other functionality from automated abuse.
CVE-2026-49952
Crítica · 9.1
Exploit público CWE-323 15/06/2026
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 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.