5.3

CVE-2025-25294: envoyproxy gateway Improper Output Neutralization for Logs

CVSS: 5.3v3.1MediumAnalyzed
AliasesGHSA-mf24-chxh-hmvjBIT-envoy-gateway-2025-25294GO-2025-3504
Published 06-03-2025Last modified 06-03-2025
Open JSON

Vulnerability summary

CVE-2025-25294 is a medium (CVSS 5.3) Improper Output Neutralization for Logs vulnerability in envoyproxy gateway. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 19.8% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.29%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 4
OPENSUSE-SU-2025:14889-1CGA-484H-632P-8C4HCGA-5QFX-X25R-XC9MCGA-GR5J-5673-VXGV

Timeline

  1. 06-03-2025
    PublishedVulnerability first disclosed.
  2. 06-03-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

+0.01 pp

From 0.28% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • tigera-operator-1.37< 1.37.1-r1
  • tigera-operator-fips-1.37< 1.37.1-r1
Envoyproxy1 product
  • gateway≥ 1.3.0-rc.1, < 1.3.1 | < 1.2.7 | ≥ 1.3.0, < 1.3.1
Github.com/envoyproxy1 product
  • gateway< 1.2.7 | ≥ 1.3.0-rc.1, < 1.3.1

3 vendors · 4 products

References

10 links