Falang multilanguage <= 1.3.65 - Unauthenticated PHP Object Injection

8.1
Deserialization of Untrusted Data
CVE CVE-2025-58619
CVSS 8.1 (High)
Publicly Published September 16, 2025
Last Updated September 22, 2025
Researcher Nguyen Xuan Chien

Description

The Falang multilanguage for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.3.65 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

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Vulnerability Details for Falang multilanguage for WordPress

Software Type Plugin
Software Slug falang (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.3.66, or a newer patched version
Affected Version
  • <= 1.3.65
Patched Version
  • 1.3.66

Recent vulnerabilities in Falang multilanguage for WordPress

# Title CVE ID CVSS Researchers Date
1 Falang multilanguage for WordPress <= 1.4.2 - Authenticated (Subscriber+) Privilege Escalation CVE-2026-54805 8.8 ParkHyunWoo June 16, 2026
2 Falang multilanguage <= 1.3.61 - Cross-Site Request Forgery CVE-2025-48285 4.3 domiee13 May 19, 2025
3 Falang multilanguage for WordPress <= 1.3.52 - Missing Authorization to Translation Update and Information Exposure CVE-2024-6869 5.4 Lucio Sá August 7, 2024
4 Falang multilanguage <= 1.3.51 - Cross-Site Request Forgery CVE-2024-37240 4.3 Dhabaleshwar Das June 21, 2024
5 Falang multilanguage for WordPress <= 1.3.49 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2024-4417 4.4 Benedictus Jovan (aillesiM) May 10, 2024
6 Falang multilanguage <= 1.3.47 - Authenticated (Administrator+) SQL Injection CVE-2024-30495 7.2 Jean Tirstan T March 28, 2024
7 Falang multilanguage <= 1.3.39 - Cross-Site Request Forgery via add_language CVE-2023-37968 5.4 Skalucy July 12, 2023
8 Falang multilanguage for WordPress < 1.3.18 - Reflected Cross-Site Scripting 6.1 WPScanTeam October 25, 2021

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