CVE-2009-3898

Nginx vulnerability

CVSS

4.9

EPSS

17.6%

EPSS pct

97th

Exploited

No known

Directory traversal vulnerability in src/http/modules/ngx_http_dav_module.c in nginx (aka Engine X) before 0.7.63, and 0.8.x before 0.8.17, allows remote authenticated users to create or overwrite arbitrary files via a .. (dot dot) in the Destination HTTP header for the WebDAV (1) COPY or (2) MOVE method.

Affected vendor

Affected product

Nginx

CVSS vector

AV:N/AC:M/Au:S/C:P/I:P/A:N

Weakness type (CWE)

CWE-22 — Path Traversal

Published

2009-11-24

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring single-factor authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity.

Its EPSS score of 17.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2009-3898

Confirm whether F5 Nginx is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2009-3898.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-3898

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-3898 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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