CVE-2025-47952Public exploitNetwork attack vector

Unauthenticated middleware bypass via encoded path traversal

Published May 30, 2025 · Updated May 30, 2025

Path traversal in Traefik Proxy 2.x before 2.11.25 and 3.x before 3.4.1 allows remote attackers to bypass middleware via encoded paths. The HTTP router matches Path, PathPrefix, or PathRegex rules before normalizing percent-encoded dot segments, so another router can send the request to a backend. Exploitation requires path-based routers that expose only part of a downstream API, and it reaches otherwise unexposed endpoints without the intended middleware chain.

CVSS severity9.1
Critical
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Traefik Proxy 2.x before 2.11.25 and 3.x before 3.4.1 allows remote attackers to bypass middleware via encoded paths. The HTTP router matches Path, PathPrefix, or PathRegex rules before normalizing percent-encoded dot segments, so another router can send the request to a backend. Exploitation requires path-based routers that expose only part of a downstream API, and it reaches otherwise unexposed endpoints without the intended middleware chain.

The record

CVE
CVE-2025-47952
Published
May 30, 2025
Updated
May 30, 2025
Vendor
Traefik Labs
Product
Traefik Proxy
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 30, 2025CVE publishedPublication date reported by the CVE source.
  2. May 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.11.25
  2. Affected versionversion=< 3.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Traefik Labs · Traefik Proxyversion=< 2.11.25; version=< 3.4.1

Published CVSS scores

2.9GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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