CVE-2026-27379
Published: 05 March 2026
Summary
CVE-2026-27379 is a high-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 27.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 CM-11 (User-installed Software) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-27379 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the NextScripts social-networks-auto-poster-facebook-twitter-g WordPress plugin, enabling Object Injection. The issue affects all versions of the plugin from n/a through 4.4.7.
With a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), the vulnerability can be exploited remotely by authenticated attackers requiring only low privileges. Exploitation involves low complexity and no user interaction, allowing high-impact compromise of confidentiality, integrity, and availability.
Mitigation details are provided in the Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/social-networks-auto-poster-facebook-twitter-g/vulnerability/wordpress-nextscripts-plugin-4-4-6-php-object-injection-vulnerability?_s_id=cve.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9633
Vulnerability details
Deserialization of Untrusted Data vulnerability in NextScripts NextScripts social-networks-auto-poster-facebook-twitter-g allows Object Injection.This issue affects NextScripts: from n/a through <= 4.4.7.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
PHP object injection via untrusted deserialization in public-facing WordPress plugin enables remote exploitation by low-priv authenticated users for full system compromise.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires timely patching and remediation of the deserialization flaw in the NextScripts WordPress plugin to prevent object injection exploitation.
Enforces validation of untrusted data inputs to block malicious deserialization attempts leading to object injection in the plugin.
Prohibits user installation of unapproved software like the vulnerable NextScripts plugin, preventing introduction of the deserialization vulnerability.