CVE-2026-1405
Published: 19 February 2026
Summary
CVE-2026-1405 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Wordpress (inferred from references). Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 13.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
The Slider Future plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the slider_future_handle_image_upload function. The flaw affects all versions through 1.0.5 and is tracked as CWE-434. It carries a CVSS 3.1 score of 9.8, reflecting network-accessible exploitation without authentication or user interaction.
Unauthenticated attackers can upload arbitrary files to the server, which may enable remote code execution on the affected site. The vulnerability can be reached directly over the network, allowing an adversary to place and potentially execute malicious content.
Public references include the plugin source at the WordPress Trac repository and a detailed entry from Wordfence threat intelligence, though no specific patch or mitigation guidance is provided in the available data. The EPSS score stands at 0.2050 with no material increase from an earlier lower value.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-8115
Vulnerability details
The Slider Future plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'slider_future_handle_image_upload' function in all versions up to, and including, 1.0.5. This makes it possible for unauthenticated attackers to upload arbitrary…
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files on the affected site's server which may make remote code execution possible.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Arbitrary file upload in public-facing WordPress plugin enables exploitation of public-facing application (T1190) and facilitates deployment of web shells for RCE (T1505.003).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of file-type and content on all inputs, blocking the unauthenticated arbitrary-file upload in slider_future_handle_image_upload.
Enforces authentication and authorization checks before any upload function is reached, eliminating the unauthenticated attack vector described in the CVE.
Requires malicious-code scanning and blocking of uploaded files before they can be stored or executed, mitigating the RCE path after a file is received.