CVE-2011-1498

Httpclient vulnerability

CVSS

4.3

EPSS

6.7%

EPSS pct

93th

Exploited

No known

Apache HttpClient 4.x before 4.1.1 in Apache HttpComponents, when used with an authenticating proxy server, sends the Proxy-Authorization header to the origin server, which allows remote web servers to obtain sensitive information by logging this header.

Affected vendor

Apache

Affected product

Httpclient

CVSS vector

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

Weakness type (CWE)

CWE-200 — Exposure of Sensitive Information

Published

2011-07-07

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality.

Its EPSS score of 6.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2011-1498

Confirm whether Apache Httpclient is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2011-1498.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-1498

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-1498 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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