CVE-2009-4837: Multiple cross-site scripting (XSS) vulnerabilities in Basic Analysis and Security Engine (BASE) before 1.4.3.

Q: How do I fix CVE-2009-4837?

basic analysis and security engine: upgrade to newer than 1.4.3. Exact commands for each OS are on this page.

Q: Is CVE-2009-4837 being exploited?

CVE-2009-4837 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-2009-4837 affect?

CVE-2009-4837 affects basic analysis and security engine. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in Basic Analysis and Security Engine (BASE) before 1.4.3.1 allow remote attackers to inject arbitrary web script or HTML via the (1) sig[1] parameter to base/base_qry_main.php, or the tim

Q: How urgent is CVE-2009-4837?

Priority 36/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2009-4837 is a medium-severity flaw (CVSS 4.3) affecting basic analysis and security engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in Basic Analysis and Security Engine (BASE) before 1.4.3.1 allow remote attackers to inject arbitrary web script or HTML via the (1) sig[1] parameter to base/base_qry_main.php, or the time[0][1] parameter to (2) base/base_stat_alerts.php or (3) base/base_stat_uaddr.php. NOTE: some of these details are obtained from third party information.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-79
Published	2010-05-06
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

2010-05-06 12:47 UTCPublished CVE record published
2026-06-16 23:14 UTCUpdated Record last modified

secureideas basic analysis and security engine UPGRADE

Affected: <= 1.4.3 · 1.1 · 1.1.2 · 1.1.3 · 1.1.4 · 1.2 · 1.2.0 · 1.2.1

Fixed in: newer than 1.4.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy basic-analysis-and-security-engine || rpm -q basic-analysis-and-security-engine || basic-analysis-and-security-engine --version

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

sudo apt update && sudo apt install --only-upgrade basic-analysis-and-security-engine

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade basic-analysis-and-security-engine

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-2009-4837?

basic analysis and security engine: upgrade to newer than 1.4.3. Exact commands for each OS are on this page.

Is CVE-2009-4837 being exploited?

CVE-2009-4837 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-2009-4837 affect?

CVE-2009-4837 affects basic analysis and security engine. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in Basic Analysis and Security Engine (BASE) before 1.4.3.1 allow remote attackers to inject arbitrary web script or HTML via the (1) sig[1] parameter to base/base_qry_main.php, or the tim

How urgent is CVE-2009-4837?

Priority 36/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2012-1199 HIGH 7.5 DOWNGRADE Multiple PHP remote file inclusion vulnerabilities in Basic Analysis and Security Engine (BASE) 1.4.5 allow re
CVE-2012-1198 HIGH 7.5 DOWNGRADE base_ag_main.php in Basic Analysis and Security Engine (BASE) 1.4.5 allows remote attackers to execute arbitra
CVE-2009-4839 MEDIUM 4.3 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in Basic Analysis and Security Engine (BASE), possibly 1.4
CVE-2009-4838 HIGH 7.5 UPGRADE SQL injection vulnerability in base_ag_common.php in Basic Analysis and Security Engine (BASE) before 1.4.3.1
CVE-2007-6156 MEDIUM 4.3 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in base_qry_main.php in Base Analysis and Security Engine

References

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