Is CVE-2012-4001 being actively exploited?

CVE-2012-4001 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2012-4001?

CVE-2012-4001 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2012-4001

MEDIUM · CVSS 5.0EPSS 0.7%EU EUVD

The mod_pagespeed module before 0.10.22.6 for the Apache HTTP Server does not properly verify its host name, which allows remote attackers to trigger HTTP requests to arbitrary hosts via unspecified vectors, as demonstrated by requests to intranet servers.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness (CWE): CWE-20
EPSS score: 0.7% (53th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2012-3945)
Published: September 15, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-3945 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.

View on the EU Vulnerability Database

Affected products

apache / http server
google / mod pagespeed
google / mod pagespeed

References

https://developers.google.com/speed/docs/mod_pagespeed/CVE-2012-4001(Vendor Advisory)
https://developers.google.com/speed/docs/mod_pagespeed/announce-0.10.22.6(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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