How severe is CVE-2025-25294?

CVE-2025-25294 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-25294 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-25294?

CVE-2025-25294 affects Envoyproxy Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-25294?

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

Does CVE-2025-25294 have an EU (EUVD) identifier?

Yes. CVE-2025-25294 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7667.

When was CVE-2025-25294 published?

CVE-2025-25294 was published on 2025-03-06 and last updated on 2026-06-17.

CVE-2025-25294

CVE-2025-25294 is a medium-severity vulnerability in Envoyproxy Gateway with a CVSS 3.x base score of 5.3. 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-117.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7667
Weakness: CWE-117
Affected product: Envoyproxy Gateway
Published: 2025-03-06
Last modified: 2026-06-17

Description

Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. In all Envoy Gateway versions prior to 1.2.7 and 1.3.1 a default Envoy Proxy access log configuration is used. This format is vulnerable to log injection attacks. If the attacker uses a specially crafted user-agent which performs json injection, then he could add and overwrite fields to the access log. This vulnerability is fixed in 1.3.1 and 1.2.7. One can overwrite the old text based default format with JSON formatter by modifying the "EnvoyProxy.spec.telemetry.accessLog" setting.

Frequently asked questions

What is CVE-2025-25294?: Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. In all Envoy Gateway versions prior to 1.2.7 and 1.3.1 a default Envoy Proxy access log configuration is used. This format is vulnerable to log injection attacks. If the attacker uses a specially crafted user-agent which performs json injection, then he could add and overwrite fields to the access log. This vulnerability is fixed in 1.3.1 and 1.2.7. One can overwrite the old text based default format with JSON formatter by modifying the "EnvoyProxy.spec.telemetry.accessLog" setting.
How severe is CVE-2025-25294?: CVE-2025-25294 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-25294 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-25294?: CVE-2025-25294 affects Envoyproxy Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-25294?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-25294 have an EU (EUVD) identifier?: Yes. CVE-2025-25294 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7667.
When was CVE-2025-25294 published?: CVE-2025-25294 was published on 2025-03-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:envoyproxy:gateway:*:*:*:*:*:*:*:*

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