How severe is CVE-2016-2159?

CVE-2016-2159 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-2016-2159 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-2159?

CVE-2016-2159 primarily affects Moodle. In total, 33 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-2159?

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

When was CVE-2016-2159 published?

CVE-2016-2159 was published on 2016-05-22 and last updated on 2026-06-17.

CVE-2016-2159

CVE-2016-2159 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-284.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Moodle
Published: 2016-05-22
Last modified: 2026-06-17

Description

The save_submission function in mod/assign/externallib.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 allows remote authenticated users to bypass intended due-date restrictions by leveraging the student role for a web-service request.

Frequently asked questions

What is CVE-2016-2159?: The save_submission function in mod/assign/externallib.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 allows remote authenticated users to bypass intended due-date restrictions by leveraging the student role for a web-service request.
How severe is CVE-2016-2159?: CVE-2016-2159 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-2016-2159 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-2159?: CVE-2016-2159 primarily affects Moodle. In total, 33 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-2159?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-2159 published?: CVE-2016-2159 was published on 2016-05-22 and last updated on 2026-06-17.

References

Affected products (33)

cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.6:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.7:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.8:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.9:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.10:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.11:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.7.12:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.5:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.6:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.7:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.8:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.9:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.8.10:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.9.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.9.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.9.2:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.9.3:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:2.9.4:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:3.0.0:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:moodle:moodle:3.0.2:*:*:*:*:*:*:*

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