How severe is CVE-2025-1243?

CVE-2025-1243 has a CVSS 4.0 base score of 2.0, rated low severity.

Is CVE-2025-1243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-1243?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-1243 have an EU (EUVD) identifier?

Yes. CVE-2025-1243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2097.

When was CVE-2025-1243 published?

CVE-2025-1243 was published on 2025-02-12 and last updated on 2026-06-17.

CVE-2025-1243

CVE-2025-1243 is a low-severity vulnerability with a CVSS 4.0 base score of 2.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-311.

Key facts

Severity: Low (CVSS 4.0 base score 2.0)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-2097
Weakness: CWE-311
Published: 2025-02-12
Last modified: 2026-06-17

Description

The Temporal api-go library prior to version 1.44.1 did not send `update response` information to Data Converter when the proxy package within the api-go module was used in a gRPC proxy prior to transmission. This resulted in information contained within the `update response` field not having Data Converter transformations (e.g. encryption) applied. This is an issue only when using the UpdateWorkflowExecution APIs (released on 13th January 2025) with a proxy leveraging the api-go library before version 1.44.1. Other data fields were correctly sent to Data Converter. This issue does not impact the Data Converter server. Data was encrypted in transit. Temporal Cloud services are not impacted.

Frequently asked questions

What is CVE-2025-1243?: The Temporal api-go library prior to version 1.44.1 did not send `update response` information to Data Converter when the proxy package within the api-go module was used in a gRPC proxy prior to transmission. This resulted in information contained within the `update response` field not having Data Converter transformations (e.g. encryption) applied. This is an issue only when using the UpdateWorkflowExecution APIs (released on 13th January 2025) with a proxy leveraging the api-go library before version 1.44.1. Other data fields were correctly sent to Data Converter. This issue does not impact the Data Converter server. Data was encrypted in transit. Temporal Cloud services are not impacted.
How severe is CVE-2025-1243?: CVE-2025-1243 has a CVSS 4.0 base score of 2.0, rated low severity.
Is CVE-2025-1243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-1243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-1243 have an EU (EUVD) identifier?: Yes. CVE-2025-1243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2097.
When was CVE-2025-1243 published?: CVE-2025-1243 was published on 2025-02-12 and last updated on 2026-06-17.

References

Other CWE-311 (Missing Encryption of Sensitive Data) vulnerabilities

CVE-2023-6339 — Critical (CVSS 10.0): Google Nest WiFi Pro root code-execution & user-data compromise
CVE-2023-4420 — Critical (CVSS 9.8): A remote unprivileged attacker can intercept the communication via e.g. Man-In-The-Middle, due to the absence of…
CVE-2023-0750 — Critical (CVSS 9.8): Yellobrik PEC-1864 implements authentication checks via javascript in the frontend interface. When the device can be…
CVE-2020-15331 — Critical (CVSS 9.8): Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded OAUTH_SECRET_KEY in /opt/axess/etc/default/axess.
CVE-2019-3431 — Critical (CVSS 9.8): All versions up to V4.01.01.02 of ZTE ZXCLOUD GoldenData VAP product have encryption problems vulnerability. Attackers…
CVE-2019-12924 — Critical (CVSS 9.8): MailEnable Enterprise Premium 10.23 was vulnerable to XML External Entity Injection (XXE) attacks that could be…

Browse all CWE-311 (Missing Encryption of Sensitive Data) vulnerabilities →