How severe is CVE-2009-3657?

CVE-2009-3657 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2009-3657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3657?

CVE-2009-3657 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-2009-3657?

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

When was CVE-2009-3657 published?

CVE-2009-3657 was published on 2009-10-09 and last updated on 2026-06-16.

CVE-2009-3657

CVE-2009-3657 is a medium-severity vulnerability in Tim Nelson Shared Sign-on with a CVSS 2.0 base score of 5.8. 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-287.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Tim Nelson Shared Sign-on
Published: 2009-10-09
Last modified: 2026-06-16

Description

Session fixation vulnerability in Shared Sign-On 5.x and 6.x, a module for Drupal, allows remote attackers to hijack web sessions via unspecified vectors.

Frequently asked questions

What is CVE-2009-3657?: Session fixation vulnerability in Shared Sign-On 5.x and 6.x, a module for Drupal, allows remote attackers to hijack web sessions via unspecified vectors.
How severe is CVE-2009-3657?: CVE-2009-3657 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2009-3657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3657?: CVE-2009-3657 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-2009-3657?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3657 published?: CVE-2009-3657 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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