CVE-2009-4590: Cross-site scripting (XSS) vulnerability in base_local_rules.php in Basic Analysis and Security Engine (BASE)

Q: How do I fix CVE-2009-4590?

base: upgrade to newer than 1.4.3. Exact commands for each OS are on this page.

Q: Is CVE-2009-4590 being exploited?

CVE-2009-4590 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-2009-4590 affect?

CVE-2009-4590 affects base. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in base_local_rules.php in Basic Analysis and Security Engine (BASE) before 1.4.4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Q: How urgent is CVE-2009-4590?

Priority 31/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2009-4590 is a medium-severity flaw (CVSS 4.3) affecting base. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in base_local_rules.php in Basic Analysis and Security Engine (BASE) before 1.4.4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-79
Published	2010-01-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: secureideas

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

Am I affected?

Timeline

2010-01-07 18:30 UTCPublished CVE record published
2026-06-16 23:13 UTCUpdated Record last modified

secureideas base UPGRADE

Affected: <= 1.4.3 · 0.9.8 · 0.9.9 · 1.0 · 1.2.4 · 1.2.5 · 1.2.6 · 1.2.7

Fixed in: newer than 1.4.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.4.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade base

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-2009-4590?

base: upgrade to newer than 1.4.3. Exact commands for each OS are on this page.

Is CVE-2009-4590 being exploited?

CVE-2009-4590 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-2009-4590 affect?

CVE-2009-4590 affects base. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in base_local_rules.php in Basic Analysis and Security Engine (BASE) before 1.4.4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

How urgent is CVE-2009-4590?

Priority 31/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

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References

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