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

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HIGH

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

Published Sep 3, 2008

7.5

HIGH

CVSS 2.0

EPSS 0.51%

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.

Affected products

Remediation

No remediation recorded yet.

Metrics

0.51% 0.00514

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00514

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.51% (0.00514)	41.60th	v5 (v2026.06.15)
Jun 15, 2026	0.51% (0.00514)	39.44th	v5 (v2026.06.15)
Mar 17, 2025	0.13% (0.00132)	30.24th	v4 (v2025.03.14)
Dec 12, 2024	0.12% (0.00116)	47.03th	v3 (v2023.03.01)
May 3, 2024	0.12% (0.00120)	45.91th	v3 (v2023.03.01)
Mar 7, 2023	0.12% (0.00116)	43.76th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Sep 10, 2022	0.89% (0.00885)	26.24th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)

Weaknesses (1)

CWE-287

Improper Authentication

References (2)

http://www.kb.cert.org/vuls/id/612636
third-party-advisoryx_refsource_CERT-VNUS Government Resource
http://www.kb.cert.org/vuls/id/MIMG-7FQGWU
x_refsource_CONFIRM

Link	Providers	Tags
http://www.kb.cert.org/vuls/id/612636		third-party-advisoryx_refsource_CERT-VNUS Government Resource
http://www.kb.cert.org/vuls/id/MIMG-7FQGWU		x_refsource_CONFIRM

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Sep 3, 2008

Updated Sep 16, 2024

Reserved Sep 3, 2008

Link CVE-2008-3891

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2008-3891

Red Hat

Severity n/a

Public date n/a

Links CVE-2008-3891