CVE-2026-1357 exposes a critical WordPress WPvivid plugin flaw, allowing unauthenticated RCE, enabling attackers to upload PHP files and fully compromise sites. The post CVE-2026-1357: WordPress Plugin RCE Exposes Sites to Full Takeover appeared first on Indusface.

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CVE-2026-1357 is a critical remote code execution vulnerability in the WPvivid Backup & Migration WordPress plugin (900,000+ installations) that allows unauthenticated attackers to upload and execute arbitrary PHP files. The flaw stems from improper RSA decryption error handling that produces a predictable null-byte encryption key, combined with inadequate file path sanitization enabling directory traversal. Attackers can exploit this via crafted HTTP requests to the backup receiving endpoint without authentication. Version 0.9.124 patches the vulnerability through proper decryption failure handling, strict path validation, and file type enforcement. Immediate upgrade is critical as public exploits exist and the vulnerability enables complete site compromise.

CVE-2026-1357: WordPress Plugin RCE Exposes Sites to Full Takeover

Root Cause Behind CVE-2026-1357 in WordPress

CVE-2026-1357 – Mitigation and Remediation Guidance