The vulnerability identified as CVE-2025-1243 affects the Temporal api-go library versions prior to 1.44.1. This vulnerability allows the library to fail in sending `update response` information to the Data Converter when the proxy package within the api-go module is utilized in a gRPC proxy before transmission. Consequently, the information contained in the `update response` field does not undergo Data Converter transformations, such as encryption. It is pertinent to note that this issue arises exclusively when employing the UpdateWorkflowExecution APIs, which were released on January 13, 2025, and utilize a proxy leveraging the api-go library versions earlier than 1.44.1.
Despite this vulnerability, other data fields were sent correctly to the Data Converter. It is important to emphasize that this does not impact the Data Converter server, and data remains encrypted in transit. Furthermore, Temporal Cloud services are not affected by this issue.
Given that the CVSS score for this vulnerability is 2, categorized as low severity, organizations should prioritize addressing this vulnerability within their routine maintenance schedules to ensure comprehensive security.
It is crucial for organizations using the affected library versions to consider the implications of this vulnerability, particularly in scenarios where sensitive data may be involved.
The vulnerability was officially published on February 12, 2025, and is classified under CWE-311, which pertains to Missing Encryption of Sensitive Data.
Organizations should stay informed about updates from Temporal regarding this issue and ensure that they apply the necessary patches.
In conclusion, while the immediate risk posed by CVE-2025-1243 is low, organizations must remain vigilant to ensure that they address this vulnerability in their patch cycles.
Vulnerability Details
This vulnerability allows the Temporal api-go library to fail in sending `update response` information to the Data Converter when a gRPC proxy is used. The vulnerability is classified as low severity, with a CVSS score of 2. The official CVE description highlights the absence of Data Converter transformations applied to the `update response` field. The affected product is the Temporal api-go library, specifically versions prior to 1.44.1, with the vulnerability first disclosed on February 12, 2025.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of `update response` data sent to Data Converter when using the api-go library in a gRPC proxy context. The attack vector is classified as local, requiring a low level of complexity to exploit. The privileges required are low, and no user interaction is necessary for exploitation. The confidentiality impact is low, while integrity and availability impacts are non-existent.
Risk & Impact Analysis
Risk to organizations includes potential exposure of sensitive information in the `update response` field due to the lack of encryption if proper transformations are not applied. The deployment risk is relatively low, but organizations utilizing the affected library should consider the implications of this vulnerability on their data security practices. The urgency for addressing this vulnerability is classified as low, as there is no active exploitation known at this time.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of the Temporal api-go library prior to version 1.44.1. Organizations should update to the latest version to mitigate this risk.
Mitigation & Remediation
Organizations should prioritize upgrading the Temporal api-go library to version 1.44.1 or later to ensure that `update response` information is correctly processed by the Data Converter. If an immediate upgrade is not possible, implement workarounds by carefully managing the use of the UpdateWorkflowExecution APIs and monitoring the data sent to the Data Converter.
For further guidance on improving application security, organizations may consider reviewing our application security assessment services to identify potential vulnerabilities.
Detection Guidance
Monitoring logs for anomalies in the `update response` data fields can help identify instances where transformations may not have been applied. Organizations should focus on detecting any unauthorized access or unusual patterns in the data processing flow.
AppSecure Threat Intelligence Insight
The low severity of CVE-2025-1243 indicates a minor threat level, but organizations should remain cautious and implement security best practices to mitigate any potential exposure. This vulnerability exemplifies the importance of ensuring that all data transformations are consistently applied across all channels, especially in systems handling sensitive data.
For further insights into secure coding practices, organizations may benefit from reviewing our secure coding practices guide to enhance their overall security posture.
Additionally, organizations should consider implementing penetration testing methodologies to regularly assess their systems for similar vulnerabilities.
Finally, organizations are encouraged to stay informed about the latest trends and threats in the cybersecurity landscape to proactively mitigate risks in their environments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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