CVE-2009-4025: Argument injection vulnerability in the traceroute function in Traceroute.php in the Net_Traceroute package be

Q: How do I fix CVE-2009-4025?

pear: upgrade to newer than 0.21.1. Exact commands for each OS are on this page.

Q: Is CVE-2009-4025 being exploited?

CVE-2009-4025 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-2009-4025 affect?

CVE-2009-4025 affects pear. Severity is high (CVSS 10.0). Argument injection vulnerability in the traceroute function in Traceroute.php in the Net_Traceroute package before 0.21.2 for PEAR allows remote attackers to execute arbitrary shell commands via the host parameter. NOTE: some of these deta

Q: How urgent is CVE-2009-4025?

Priority 58/100. Critical severity; EPSS top 7%: very likely to be exploited

This month

HIGH 10.0UPGRADE

CVE-2009-4025 is a high-severity flaw (CVSS 10.0) affecting pear. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Argument injection vulnerability in the traceroute function in Traceroute.php in the Net_Traceroute package before 0.21.2 for PEAR allows remote attackers to execute arbitrary shell commands via the host parameter. NOTE: some of these details are obtained from third party information.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	6.1% (top 7%)
CISA exploited list	No
Weakness	CWE-78
Published	2009-11-29
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: pear

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

Am I affected?

Timeline

2009-11-29 13:07 UTCPublished CVE record published
2026-06-16 23:12 UTCUpdated Record last modified

pear pear UPGRADE

Affected: <= 0.21.1 · 0.11 · 0.20 · 0.21

Fixed in: newer than 0.21.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pear || rpm -q pear || pear --version

2. UPGRADE to newer than 0.21.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pear

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pear

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-2009-4025?

pear: upgrade to newer than 0.21.1. Exact commands for each OS are on this page.

Is CVE-2009-4025 being exploited?

CVE-2009-4025 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-2009-4025 affect?

CVE-2009-4025 affects pear. Severity is high (CVSS 10.0). Argument injection vulnerability in the traceroute function in Traceroute.php in the Net_Traceroute package before 0.21.2 for PEAR allows remote attackers to execute arbitrary shell commands via the host parameter. NOTE: some of these deta

How urgent is CVE-2009-4025?

Priority 58/100. Critical severity; EPSS top 7%: very likely to be exploited

Software pages

PHP vulnerabilities

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References

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