The RepairBuddy – Repair Shop CRM & Booking Plugin for WordPress is vulnerable to Insecure Direct Object Reference due to missing capability checks on the wc_upload_and_save_signature_handler function in all versions up to, and including, 4.1116. This vulnerability allows authenticated attackers, with Subscriber-level access and above, to upload arbitrary signatures to any order in the system, potentially modifying order metadata and triggering unauthorized status changes.
This vulnerability has been assigned a CVSS score of 4.3, indicating a medium severity level. Its classification suggests that while the attack complexity is low and requires minimal privileges, the impact on data integrity is significant, as it allows modification of important order information.
Risk to organizations includes unauthorized alterations to order statuses, which can lead to operational disruptions and loss of customer trust. Therefore, organizations should prioritize patching immediately.
As of now, there is no known public exploit, and the vulnerability is not actively exploited in the wild. However, given the potential risks associated, it is advisable for organizations using the RepairBuddy plugin to address this vulnerability in their upcoming patch cycles.
Vulnerability Details
The vulnerability is categorized under CWE-862, which pertains to missing capability checks. The official CVE description highlights the nature of the vulnerability, emphasizing the lack of proper checks that would prevent unauthorized access to sensitive functions.
The publication date for this CVE is January 17, 2026, and the vulnerability status is currently deferred. Organizations should remain vigilant for updates regarding patch availability.
Technical Analysis
The root cause of this vulnerability lies in the function wc_upload_and_save_signature_handler, which fails to implement necessary capability checks. This oversight allows attackers with low privileges to manipulate order data without proper authorization.
The attack vector is network-based, and the complexity is low, making it relatively easy for attackers to exploit the vulnerability. It requires low privileges and does not necessitate user interaction, which increases the risk profile of this vulnerability.
In terms of impact, the confidentiality impact is none, while the integrity impact is low. This indicates that while sensitive data is not directly compromised, the ability to alter order statuses poses significant risks to business operations.
Risk & Impact Analysis
Real-world deployment risk involves the potential for an attacker to exploit this vulnerability to change order details without authorization, impacting transaction integrity. The blast radius could include multiple orders if an attacker gains access to a system with multiple users.
Organizations should assess their exposure to this vulnerability based on their user access controls and the criticality of the order data managed within the RepairBuddy plugin. The medium CVSS score suggests that while immediate action may not be urgent, it should be addressed in priority patch cycles.
Affected organizations should also consider implementing additional logging and monitoring to detect any unauthorized changes, further enhancing their security posture.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include all versions up to, and including, 4.1116. Organizations using the RepairBuddy plugin should ensure they are on the latest version to mitigate this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching the RepairBuddy plugin to the latest version to close this vulnerability. If a patch is unavailable, consider implementing workarounds such as enhancing capability checks within the affected function.
Additionally, ensure that user roles and permissions are strictly enforced to limit access to critical functions, thereby mitigating the risk of unauthorized modifications.
For further guidance on securing WordPress plugins and enhancing your application's security posture, organizations can refer to our application security assessment.
Detection Guidance
Organizations should monitor logs for any unauthorized access attempts or changes to order statuses. Behavioral anomalies such as unexpected changes in order metadata should be flagged for review.
Network signatures can be useful in identifying attempts to exploit this vulnerability, and any changes to the wc_upload_and_save_signature_handler function should be closely monitored.
AppSecure Threat Intelligence Insight
The medium severity of CVE-2026-0820 indicates a significant but not critical risk for organizations. It serves as a reminder of the importance of thorough capability checks in application development. Security teams should ensure that all user roles are correctly implemented to avoid situations where unauthorized actions can be performed.
This vulnerability exemplifies the need for continuous security assessments and improvements in development practices. For best practices in vulnerability management, organizations can refer to our vulnerability management program.
Additionally, the incident underscores the necessity of adopting a proactive security stance, with regular penetration testing to unveil potential weaknesses in WordPress plugins and other components. Organizations are encouraged to consider our penetration testing services to assess their security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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