How severe is CVE-2009-0891?

CVE-2009-0891 has a CVSS 2.0 base score of 5.5, rated medium severity.

Is CVE-2009-0891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0891?

CVE-2009-0891 primarily affects Ibm Websphere Application Server. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0891?

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

When was CVE-2009-0891 published?

CVE-2009-0891 was published on 2009-03-25 and last updated on 2026-06-16.

CVE-2009-0891

CVE-2009-0891 is a medium-severity vulnerability in Ibm Websphere Application Server with a CVSS 2.0 base score of 5.5. 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: Medium (CVSS 2.0 base score 5.5)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Ibm Websphere Application Server
Published: 2009-03-25
Last modified: 2026-06-16

Description

The Web Services Security component in IBM WebSphere Application Server 7.0 before Fix Pack 1 (7.0.0.1), 6.1 before Fix Pack 23 (6.1.0.23),and 6.0.2 before Fix Pack 33 (6.0.2.33) does not properly enforce (1) nonce and (2) timestamp expiration values in WS-Security bindings as stored in the com.ibm.wsspi.wssecurity.core custom property, which allows remote authenticated users to conduct session hijacking attacks.

Frequently asked questions

What is CVE-2009-0891?: The Web Services Security component in IBM WebSphere Application Server 7.0 before Fix Pack 1 (7.0.0.1), 6.1 before Fix Pack 23 (6.1.0.23),and 6.0.2 before Fix Pack 33 (6.0.2.33) does not properly enforce (1) nonce and (2) timestamp expiration values in WS-Security bindings as stored in the com.ibm.wsspi.wssecurity.core custom property, which allows remote authenticated users to conduct session hijacking attacks.
How severe is CVE-2009-0891?: CVE-2009-0891 has a CVSS 2.0 base score of 5.5, rated medium severity.
Is CVE-2009-0891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0891?: CVE-2009-0891 primarily affects Ibm Websphere Application Server. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0891?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0891 published?: CVE-2009-0891 was published on 2009-03-25 and last updated on 2026-06-16.

References

Affected products (59)

cpe:2.3:a:ibm:websphere_application_server:6.0.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2:*:fp17:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.4:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.5:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.6:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.7:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.8:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.9:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.10:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.11:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.12:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.13:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.14:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.15:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.16:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.17:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.18:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.19:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.20:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.21:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.22:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.23:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.24:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.25:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.27:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.28:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.29:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.30:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.31:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.0.2.32:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:6.1.0.4:*:*:*:*:*:*:*

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