How severe is CVE-2009-3656?

CVE-2009-3656 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-3656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3656?

CVE-2009-3656 primarily affects Tim Nelson Shared Sign-on. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3656?

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

When was CVE-2009-3656 published?

CVE-2009-3656 was published on 2009-10-09 and last updated on 2026-06-16.

CVE-2009-3656

CVE-2009-3656 is a medium-severity vulnerability in Tim Nelson Shared Sign-on 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-352.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Tim Nelson Shared Sign-on
Published: 2009-10-09
Last modified: 2026-06-16

Description

Cross-site request forgery (CSRF) vulnerability in Shared Sign-On 5.x and 6.x, a module for Drupal, allows remote attackers to hijack the authentication of arbitrary users via unknown vectors.

Frequently asked questions

What is CVE-2009-3656?: Cross-site request forgery (CSRF) vulnerability in Shared Sign-On 5.x and 6.x, a module for Drupal, allows remote attackers to hijack the authentication of arbitrary users via unknown vectors.
How severe is CVE-2009-3656?: CVE-2009-3656 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-3656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3656?: CVE-2009-3656 primarily affects Tim Nelson Shared Sign-on. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3656 published?: CVE-2009-3656 was published on 2009-10-09 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:tim_nelson:shared_sign-on:5.x:*:*:*:*:*:*:*
cpe:2.3:a:tim_nelson:shared_sign-on:6.x:*:*:*:*:*:*:*

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