How severe is CVE-2012-3391?

CVE-2012-3391 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2012-3391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-3391?

CVE-2012-3391 primarily affects Moodle. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-3391?

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

When was CVE-2012-3391 published?

CVE-2012-3391 was published on 2012-07-23 and last updated on 2026-06-16.

CVE-2012-3391

CVE-2012-3391 is a medium-severity vulnerability in Moodle with a CVSS 2.0 base score of 4.0. 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 4.0)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Moodle
Published: 2012-07-23
Last modified: 2026-06-16

Description

mod/forum/rsslib.php in Moodle 2.1.x before 2.1.7 and 2.2.x before 2.2.4 does not properly implement the requirement for posting before reading a Q&A forum, which allows remote authenticated users to bypass intended access restrictions by leveraging the student role and reading the RSS feed for a forum.

Frequently asked questions

What is CVE-2012-3391?: mod/forum/rsslib.php in Moodle 2.1.x before 2.1.7 and 2.2.x before 2.2.4 does not properly implement the requirement for posting before reading a Q&A forum, which allows remote authenticated users to bypass intended access restrictions by leveraging the student role and reading the RSS feed for a forum.
How severe is CVE-2012-3391?: CVE-2012-3391 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2012-3391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3391?: CVE-2012-3391 primarily affects Moodle. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-3391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-3391 published?: CVE-2012-3391 was published on 2012-07-23 and last updated on 2026-06-16.

References

Affected products (11)

cpe:2.3:a:moodle:moodle:2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.1.6:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.2.3:*:*:*:*:*:*:*

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