How severe is CVE-2011-3923?

CVE-2011-3923 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2011-3923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 89% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3923?

CVE-2011-3923 primarily affects Apache Struts. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3923?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-3923 published?

CVE-2011-3923 was published on 2019-11-01 and last updated on 2026-06-16.

CVE-2011-3923

CVE-2011-3923 is a critical-severity vulnerability in Apache Struts with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 89% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-732.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 89% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Apache Struts
Published: 2019-11-01
Last modified: 2026-06-16

Description

Apache Struts before 2.3.1.2 allows remote attackers to bypass security protections in the ParameterInterceptor class and execute arbitrary commands.

Frequently asked questions

What is CVE-2011-3923?: Apache Struts before 2.3.1.2 allows remote attackers to bypass security protections in the ParameterInterceptor class and execute arbitrary commands.
How severe is CVE-2011-3923?: CVE-2011-3923 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2011-3923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 89% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3923?: CVE-2011-3923 primarily affects Apache Struts. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3923?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-3923 published?: CVE-2011-3923 was published on 2019-11-01 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:apache:struts:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_web_server:1.0.0:*:*:*:*:*:*:*

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