How severe is CVE-2008-3891?

CVE-2008-3891 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2008-3891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-3891?

CVE-2008-3891 affects Google Google Apps. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-3891?

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-2008-3891 published?

CVE-2008-3891 was published on 2008-09-03 and last updated on 2026-06-16.

CVE-2008-3891

CVE-2008-3891 is a high-severity vulnerability in Google Google Apps with a CVSS 2.0 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-287.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Google Google Apps
Published: 2008-09-03
Last modified: 2026-06-16

Description

The SAML Single Sign-On (SSO) Service for Google Apps allows remote service providers to impersonate users at arbitrary service providers via vectors related to authentication responses that lack a request identifier and recipient field.

Frequently asked questions

What is CVE-2008-3891?: The SAML Single Sign-On (SSO) Service for Google Apps allows remote service providers to impersonate users at arbitrary service providers via vectors related to authentication responses that lack a request identifier and recipient field.
How severe is CVE-2008-3891?: CVE-2008-3891 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2008-3891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-3891?: CVE-2008-3891 affects Google Google Apps. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-3891?: 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-2008-3891 published?: CVE-2008-3891 was published on 2008-09-03 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:google:google_apps:*:*:*:*:*:*:*:*

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