How severe is CVE-2015-3273?

CVE-2015-3273 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2015-3273 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3273?

CVE-2015-3273 affects Moodle. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-3273?

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

When was CVE-2015-3273 published?

CVE-2015-3273 was published on 2016-02-22 and last updated on 2026-06-17.

CVE-2015-3273

CVE-2015-3273 is a medium-severity vulnerability in Moodle with a CVSS 3.x base score of 4.3. 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 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Moodle
Published: 2016-02-22
Last modified: 2026-06-17

Description

mod/forum/post.php in Moodle 2.9.x before 2.9.1 does not consider the mod/forum:canposttomygroups capability before authorizing "Post a copy to all groups" actions, which allows remote authenticated users to bypass intended access restrictions by leveraging per-group authorization.

Frequently asked questions

What is CVE-2015-3273?: mod/forum/post.php in Moodle 2.9.x before 2.9.1 does not consider the mod/forum:canposttomygroups capability before authorizing "Post a copy to all groups" actions, which allows remote authenticated users to bypass intended access restrictions by leveraging per-group authorization.
How severe is CVE-2015-3273?: CVE-2015-3273 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2015-3273 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3273?: CVE-2015-3273 affects Moodle. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-3273?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-3273 published?: CVE-2015-3273 was published on 2016-02-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:moodle:moodle:2.9.0:*:*:*:*:*:*:*

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