How severe is CVE-2011-4588?

CVE-2011-4588 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-4588 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4588?

CVE-2011-4588 primarily affects Moodle. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4588?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-4588 published?

CVE-2011-4588 was published on 2012-07-20 and last updated on 2026-06-16.

CVE-2011-4588

CVE-2011-4588 is a medium-severity vulnerability in Moodle with a CVSS 2.0 base score of 5.0. 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Moodle
Published: 2012-07-20
Last modified: 2026-06-16

Description

The ip_in_range function in mnet/lib.php in MNET in Moodle 1.9.x before 1.9.15 uses an incorrect data type, which allows remote attackers to bypass intended IP address restrictions via an XMLRPC request.

Frequently asked questions

What is CVE-2011-4588?: The ip_in_range function in mnet/lib.php in MNET in Moodle 1.9.x before 1.9.15 uses an incorrect data type, which allows remote attackers to bypass intended IP address restrictions via an XMLRPC request.
How severe is CVE-2011-4588?: CVE-2011-4588 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4588 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4588?: CVE-2011-4588 primarily affects Moodle. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4588?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4588 published?: CVE-2011-4588 was published on 2012-07-20 and last updated on 2026-06-16.

References

Affected products (14)

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:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.7:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.8:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.9:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.10:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.11:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.12:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.13:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:1.9.14:*:*:*:*:*:*:*

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