PT-2026-50404 · Shiftup · Shiftup

Denver Jackson · CVE-2026-40733 · Published 2026-06-17 · Updated 2026-06-18

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions ShiftUp versions 1.3 and earlier

Description An unauthenticated PHP Object Injection issue exists in the software. PHP Object Injection occurs when user-supplied input is passed to the unserialize() function without proper validation, potentially allowing an attacker to manipulate the application logic or execute arbitrary code.

Recommendations Disable or isolate the software immediately. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-40733

Affected Products

Shiftup

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-40733 · Security Note
• https://twitter.com/HugoValters/status/2067700320335995120 · Twitter Post
• https://patchstack.com/database/wordpress/theme/shiftup/vulnerability/wordpress-shiftup-theme-1-3-php-object-injection-vulnerability?_s_id=cve · Note
• https://t.me/cveNotify/169453 · Telegram Post