How severe is CVE-2011-4294?

CVE-2011-4294 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2011-4294 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4294?

CVE-2011-4294 primarily affects Moodle. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4294?

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

When was CVE-2011-4294 published?

CVE-2011-4294 was published on 2012-07-16 and last updated on 2026-06-16.

CVE-2011-4294

CVE-2011-4294 is a medium-severity vulnerability in Moodle with a CVSS 2.0 base score of 5.8. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Moodle
Published: 2012-07-16
Last modified: 2026-06-16

Description

The error-message functionality in Moodle 1.9.x before 1.9.13, 2.0.x before 2.0.4, and 2.1.x before 2.1.1 does not ensure that a continuation link refers to an http or https URL for the local Moodle instance, which might allow attackers to trick users into visiting arbitrary web sites via unspecified vectors.

Frequently asked questions

What is CVE-2011-4294?: The error-message functionality in Moodle 1.9.x before 1.9.13, 2.0.x before 2.0.4, and 2.1.x before 2.1.1 does not ensure that a continuation link refers to an http or https URL for the local Moodle instance, which might allow attackers to trick users into visiting arbitrary web sites via unspecified vectors.
How severe is CVE-2011-4294?: CVE-2011-4294 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2011-4294 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4294?: CVE-2011-4294 primarily affects Moodle. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4294?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4294 published?: CVE-2011-4294 was published on 2012-07-16 and last updated on 2026-06-16.

References

Affected products (17)

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:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.0:*:*:*:*:*:*:*

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