How severe is CVE-2009-4304?

CVE-2009-4304 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2009-4304 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4304?

CVE-2009-4304 primarily affects Moodle. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4304?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-4304 published?

CVE-2009-4304 was published on 2009-12-16 and last updated on 2026-06-16.

CVE-2009-4304

CVE-2009-4304 is a high-severity vulnerability in Moodle with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-255.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-255
Affected product: Moodle
Published: 2009-12-16
Last modified: 2026-06-16

Description

Moodle 1.8 before 1.8.11 and 1.9 before 1.9.7 does not use a random password salt in config.php, which makes it easier for attackers to conduct brute-force password guessing attacks.

Frequently asked questions

What is CVE-2009-4304?: Moodle 1.8 before 1.8.11 and 1.9 before 1.9.7 does not use a random password salt in config.php, which makes it easier for attackers to conduct brute-force password guessing attacks.
How severe is CVE-2009-4304?: CVE-2009-4304 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2009-4304 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4304?: CVE-2009-4304 primarily affects Moodle. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4304?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-4304 published?: CVE-2009-4304 was published on 2009-12-16 and last updated on 2026-06-16.

References

Affected products (15)

cpe:2.3:a:moodle:moodle:1.8.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.7:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.8:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.9:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.8.10:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.6:*:*:*:*:*:*:*

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