CVE-2013-6386

CVE-2013-6386 is a medium-severity vulnerability in Drupal with a CVSS 2.0 base score of 6.8. 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-310.

Key facts

Description

Drupal 6.x before 6.29 and 7.x before 7.24 uses the PHP mt_rand function to generate random numbers, which uses predictable seeds and allows remote attackers to predict security strings and bypass intended restrictions via a brute force attack.

Frequently asked questions

What is CVE-2013-6386?
Drupal 6.x before 6.29 and 7.x before 7.24 uses the PHP mt_rand function to generate random numbers, which uses predictable seeds and allows remote attackers to predict security strings and bypass intended restrictions via a brute force attack.
How severe is CVE-2013-6386?
CVE-2013-6386 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2013-6386 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6386?
CVE-2013-6386 primarily affects Drupal. In total, 78 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-6386?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-6386 published?
CVE-2013-6386 was published on 2013-12-07 and last updated on 2026-06-17.

References

Affected products (78)

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