How severe is CVE-2011-3140?

CVE-2011-3140 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-3140 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3140?

CVE-2011-3140 primarily affects Ibm Web Application Firewall. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3140?

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

When was CVE-2011-3140 published?

CVE-2011-3140 was published on 2011-08-15 and last updated on 2026-06-16.

CVE-2011-3140

CVE-2011-3140 is a medium-severity vulnerability in Ibm Web Application Firewall with a CVSS 2.0 base score of 5.0. 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Ibm Web Application Firewall
Published: 2011-08-15
Last modified: 2026-06-16

Description

IBM Web Application Firewall, as used on the G400 IPS-G400-IB-1 and GX4004 IPS-GX4004-IB-2 appliances with update 31.030, does not properly handle query strings with multiple instances of the same parameter, which allows remote attackers to bypass intended intrusion prevention by dividing a dangerous parameter value into substrings, as demonstrated by a SQL statement that is split across multiple iid parameters and then sent to a .aspx file on an IIS web server.

Frequently asked questions

What is CVE-2011-3140?: IBM Web Application Firewall, as used on the G400 IPS-G400-IB-1 and GX4004 IPS-GX4004-IB-2 appliances with update 31.030, does not properly handle query strings with multiple instances of the same parameter, which allows remote attackers to bypass intended intrusion prevention by dividing a dangerous parameter value into substrings, as demonstrated by a SQL statement that is split across multiple iid parameters and then sent to a .aspx file on an IIS web server.
How severe is CVE-2011-3140?: CVE-2011-3140 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-3140 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3140?: CVE-2011-3140 primarily affects Ibm Web Application Firewall. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3140?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-3140 published?: CVE-2011-3140 was published on 2011-08-15 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:ibm:web_application_firewall:-:*:*:*:*:*:*:*
cpe:2.3:h:ibm:g400_ips-g400-ib-1_appliance:31.030:*:*:*:*:*:*:*
cpe:2.3:h:ibm:gx4004_ips-gx4004-ib-2_appliance:31.030:*:*:*:*:*:*:*

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