CVE-2025-13882 in Sterling Partner Engagement Manager Essentials Edition
Summary
by MITRE • 09/18/2026
IBM Sterling Partner Engagement Manager Essentials Edition 6.3.0.0 through 6.3.0.2, and 6.2.4.0 through 6.2.4.4 and IBM Sterling Partner Engagement Manager Standard Edition 6.2.4.0 through 6.2.4.4 could allow an unauthenticated user to cause a denial of service in the email service due to improper control of interaction frequency.
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Analysis
by VulDB Data Team • 09/18/2026
The vulnerability identified in IBM Sterling Partner Engagement Manager Essentials and Standard Editions affects versions ranging from 6.3.0.0 through 6.3.0.2, as well as 6.2.4.0 through 6.2.4.4. This security flaw is classified under CWE-787: Out-of-bounds Write or CWE-190: Integer Overflow or Wraparound depending on the specific implementation details of the interaction control mechanism, but more accurately aligns with CWE-352: Cross-Site Request Forgery if it involves unauthenticated requests, or more commonly in this context, CWE-400: Uncontrolled Resource Consumption. The core issue lies in the improper control of interaction frequency within the email service component of the application. This design flaw allows an external actor to manipulate the rate at which they interact with the system without proper authentication barriers or throttling mechanisms in place.
From a technical perspective, the vulnerability stems from insufficient validation and rate-limiting controls on the endpoints responsible for handling email-related operations. An unauthenticated user can exploit this by sending a high volume of requests to these specific services. Because the application does not adequately restrict the frequency of these interactions, it fails to implement effective countermeasures such as request throttling, token-based authentication requirements for sensitive actions, or resource usage limits per session or IP address. This lack of control enables an attacker to overwhelm the email service with excessive traffic, leading to a state where the service becomes unable to process legitimate requests.
The operational impact of this vulnerability is primarily focused on availability rather than confidentiality or integrity. By triggering a denial of service condition, an adversary can disrupt critical business operations that rely on the Partner Engagement Manager for communication and partner coordination. The email service is often integral to workflow automation, notification delivery, and status updates within the partnership ecosystem. When this component becomes unresponsive due to resource exhaustion caused by excessive interaction frequency, it results in a significant degradation of system performance or a complete halt in functionality. This disruption can lead to missed communications, delayed partner onboarding processes, and potential financial losses associated with operational downtime.
This type of vulnerability is often categorized under the MITRE ATT&CK framework technique T1496: Resource Hijacking if it leads to resource exhaustion for denial of service purposes, or more specifically within web application attacks as part of T1190: Exploit Public-Facing Application when combined with other exploitation vectors. The lack of authentication requirement makes this particularly dangerous as it lowers the barrier to entry significantly, allowing any internet-facing user to attempt an attack without needing valid credentials. This aligns with common patterns seen in OWASP Top 10 vulnerabilities related to broken access control and insufficient rate limiting.
To mitigate this risk, organizations running affected versions of IBM Sterling Partner Engagement Manager should immediately apply the latest security patches provided by IBM for their respective edition and version numbers. In addition to patching, it is recommended to implement network-level controls such as Web Application Firewalls (WAF) that can detect and block abnormal traffic patterns indicative of denial-of-service attacks. Rate limiting policies should be enforced at both the application layer and infrastructure level to restrict the number of requests an unauthenticated user can make within a specific time frame. Furthermore, enabling detailed logging and monitoring for email service endpoints will help in identifying potential abuse early before it leads to significant system disruption. Regular security assessments focusing on input validation and access control mechanisms are also advised to prevent similar vulnerabilities from being introduced or exploited in the future.