How severe is CVE-2016-3165?

CVE-2016-3165 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2016-3165 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-3165?

CVE-2016-3165 primarily affects Drupal. In total, 47 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-3165?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-3165 published?

CVE-2016-3165 was published on 2016-04-12 and last updated on 2026-06-17.

CVE-2016-3165

CVE-2016-3165 is a high-severity vulnerability in Drupal with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Drupal
Published: 2016-04-12
Last modified: 2026-06-17

Description

The Form API in Drupal 6.x before 6.38 ignores access restrictions on submit buttons, which might allow remote attackers to bypass intended access restrictions by leveraging permission to submit a form with a button that has "#access" set to FALSE in the server-side form definition.

Frequently asked questions

What is CVE-2016-3165?: The Form API in Drupal 6.x before 6.38 ignores access restrictions on submit buttons, which might allow remote attackers to bypass intended access restrictions by leveraging permission to submit a form with a button that has "#access" set to FALSE in the server-side form definition.
How severe is CVE-2016-3165?: CVE-2016-3165 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2016-3165 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-3165?: CVE-2016-3165 primarily affects Drupal. In total, 47 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-3165?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-3165 published?: CVE-2016-3165 was published on 2016-04-12 and last updated on 2026-06-17.

References

Affected products (47)

cpe:2.3:a:drupal:drupal:6.0:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:beta1:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:beta2:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:beta3:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:beta4:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:dev:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:rc1:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:rc2:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:rc3:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.0:rc4:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.1:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.2:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.3:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.4:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.5:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.6:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.7:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.8:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.9:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.10:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.11:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.12:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.13:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.14:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.15:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.16:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.17:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.18:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.19:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.20:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.21:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.22:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.23:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.24:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.25:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.26:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.27:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.28:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.29:*:*:*:*:*:*:*
cpe:2.3:a:drupal:drupal:6.30:*:*:*:*:*:*:*

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