CVE-2025-54386
CVE-2025-54386 is a critical-severity vulnerability in Traefik with a CVSS 3.x base score of 9.8. 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-22.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 7.3
- EPSS exploit prediction: 1% (61st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-23415
- Weakness: CWE-22
- Affected product: Traefik
- Published:
- Last modified:
Description
Traefik is an HTTP reverse proxy and load balancer. In versions 2.11.27 and below, 3.0.0 through 3.4.4 and 3.5.0-rc1, a path traversal vulnerability was discovered in WASM Traefik’s plugin installation mechanism. By supplying a maliciously crafted ZIP archive containing file paths with ../ sequences, an attacker can overwrite arbitrary files on the system outside of the intended plugin directory. This can lead to remote code execution (RCE), privilege escalation, persistence, or denial of service. This is fixed in versions 2.11.28, 3.4.5 and 3.5.0.
Frequently asked questions
- What is CVE-2025-54386?
- Traefik is an HTTP reverse proxy and load balancer. In versions 2.11.27 and below, 3.0.0 through 3.4.4 and 3.5.0-rc1, a path traversal vulnerability was discovered in WASM Traefik’s plugin installation mechanism. By supplying a maliciously crafted ZIP archive containing file paths with ../ sequences, an attacker can overwrite arbitrary files on the system outside of the intended plugin directory. This can lead to remote code execution (RCE), privilege escalation, persistence, or denial of service. This is fixed in versions 2.11.28, 3.4.5 and 3.5.0.
- How severe is CVE-2025-54386?
- CVE-2025-54386 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-54386 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-54386?
- CVE-2025-54386 primarily affects Traefik. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-54386?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-54386 have an EU (EUVD) identifier?
- Yes. CVE-2025-54386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23415.
- When was CVE-2025-54386 published?
- CVE-2025-54386 was published on 2025-08-02 and last updated on 2026-06-17.
References
- https://github.com/traefik/plugin-service/pull/71
- https://github.com/traefik/plugin-service/pull/72
- https://github.com/traefik/traefik/commit/5ef853a0c53068f69a6c229a5815a0dc6e0a8800
- https://github.com/traefik/traefik/pull/11911
- https://github.com/traefik/traefik/releases/tag/v2.11.28
- https://github.com/traefik/traefik/security/advisories/GHSA-q6gg-9f92-r9wg
Affected products (4)
- cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
- cpe:2.3:a:traefik:traefik:3.5.0:-:*:*:*:*:*:*
- cpe:2.3:a:traefik:traefik:3.5.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:traefik:traefik:3.5.0:rc2:*:*:*:*:*:*
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