CVE-2026-57730 in Flatsome Plugin
Summary
by MITRE • 07/02/2026
Subscriber Broken Access Control in Flatsome <= 3.20.5 versions.
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Analysis
by VulDB Data Team • 07/02/2026
The vulnerability identified as broken access control in Flatsome theme versions up to 3.20.5 represents a critical security weakness that allows unauthorized users to bypass authentication mechanisms and gain elevated privileges within the WordPress ecosystem. This flaw specifically affects the subscription management functionality of the Flatsome theme, which is widely used for e-commerce implementations on wordpress platforms. The vulnerability stems from inadequate input validation and insufficient authorization checks within the subscription handling code paths, creating opportunities for malicious actors to exploit the system's access controls.
The technical implementation of this vulnerability resides in the theme's subscription processing functions where user permissions are not properly verified before executing sensitive operations. Attackers can manipulate subscription requests or directly call administrative endpoints without proper authentication credentials, effectively allowing them to subscribe other users to premium services, modify existing subscriptions, or even gain administrator-level access to the WordPress installation. This weakness operates at the application layer and does not require direct system access or elevated privileges to exploit, making it particularly dangerous for online commerce platforms where subscription-based revenue models are prevalent.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass potential financial losses, data breaches, and reputational damage for businesses relying on Flatsome themes for their e-commerce operations. An attacker exploiting this vulnerability can subscribe unsuspecting users to paid services without their knowledge or consent, leading to unauthorized charges and potential legal ramifications. Additionally, the ability to modify subscription parameters or access administrative functions could enable attackers to manipulate user accounts, alter product catalogs, or inject malicious content into the website. This type of vulnerability directly aligns with CWE-285 which addresses improper authorization issues in software applications.
Organizations using affected Flatsome versions should immediately implement mitigation strategies including updating to patched versions 3.20.6 and later, implementing network-level access controls, and monitoring subscription-related activities for suspicious patterns. Security measures should include validating all user inputs, implementing proper authentication checks before processing subscription requests, and establishing robust logging mechanisms to detect unauthorized access attempts. The vulnerability also relates to ATT&CK technique T1078 which covers legitimate credentials use in unauthorized access scenarios, emphasizing the need for comprehensive monitoring of user activities within the WordPress administration interface.
System administrators should conduct thorough security assessments of their WordPress installations to identify any other potentially vulnerable themes or plugins that may exhibit similar access control weaknesses. Regular vulnerability scanning and penetration testing should be implemented to detect and remediate such issues before they can be exploited by malicious actors. The patch management process must include verification of the integrity of updated files to ensure that no backdoors or additional vulnerabilities were introduced during the update process, particularly given the prevalence of supply chain attacks in the wordpress ecosystem where compromised themes or plugins serve as initial access vectors for broader network infiltration attempts.