CVE-2012-4001: The mod_pagespeed module before 0.10.22.6 for the Apache HTTP Server does not properly verify its host name, w

Q: How do I fix CVE-2012-4001?

mod pagespeed: upgrade to newer than 0.10.22.4. Exact commands for each OS are on this page.

Q: Is CVE-2012-4001 being exploited?

CVE-2012-4001 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2012-4001 affect?

CVE-2012-4001 affects mod pagespeed. Severity is medium (CVSS 5.0). 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 i

Q: How urgent is CVE-2012-4001?

Priority 36/100. On your watchlist

Routine

MEDIUM 5.0WATCHLISTUPGRADE

CVE-2012-4001 is a medium-severity flaw (CVSS 5.0) affecting mod pagespeed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-20
Published	2012-09-15
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: google

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-09-15 10:37 UTCPublished CVE record published
2026-06-16 23:44 UTCUpdated Record last modified

google mod pagespeed UPGRADE

Affected: <= 0.10.22.4 · 0.10.19.1

Fixed in: newer than 0.10.22.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mod-pagespeed || rpm -q mod-pagespeed || mod-pagespeed --version

2. UPGRADE to newer than 0.10.22.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mod-pagespeed

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mod-pagespeed

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-4001?

mod pagespeed: upgrade to newer than 0.10.22.4. Exact commands for each OS are on this page.

Is CVE-2012-4001 being exploited?

CVE-2012-4001 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-4001 affect?

CVE-2012-4001 affects mod pagespeed. Severity is medium (CVSS 5.0). 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 i

How urgent is CVE-2012-4001?

Priority 36/100. On your watchlist

Software pages

Apache HTTP Server vulnerabilities

Related CVEs

CVE-2013-6111 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in the mod_pagespeed module 0.x, 1.0.22.7, 1.1.x, 1.24.1, 1.3.25.1 th
CVE-2012-4360 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in the mod_pagespeed module 0.10.19.1 through 0.10.22.4 for the Apach

References

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