VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVReported exploited: VulnCheck KEV since Published EPSS 89.5% probability of exploitation in 30 days
Apache

CVE-2011-3923: Apache Struts before 2.3.1.2 allows remote attackers to bypass security protections in the ParameterInterceptor class…

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .

VulnCheck KEV lists it since . VulnCheck's own honeypots also recorded exploitation attempts.

How likely is exploitation in the next 30 days?
89.5%

EPSS score, percentile 99.8 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
Not scored

The CVE record carries no CVSS score.

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

No patch or vendor advisory is listed in the CVE record. Check Apache's advisories.

A public exploit is linked in the references.

Which versions are affected?

Affected

  • 2.3.1.2

Versions by product

Source: CISA KEV 2026.11.10, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

Description

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

Source: CVE List, as of . About the data.

What to do

Advisories and patches

No patch, vendor advisory or mitigation is listed in the CVE record. Check Apache's own security advisories for a fix, and compare your version with the affected versions below.

A public exploit is linked in the references.

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Versions by product, as listed in the CVE record (1 product)
Apache Struts
StatusVersions
Affected2.3.1.2

Source: CVE List, as of . About the data.

Timeline

DateEvent
CVE record published
CVE record last updated

References

7

Known exploited Apache vulnerabilities

  • CVE-2016-3081: Apache Struts Command Injection Vulnerability (added )
  • CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability (added )
  • CVE-2026-34197: Apache ActiveMQ Improper Input Validation Vulnerability (added )
  • CVE-2024-38475: Apache HTTP Server Improper Escaping of Output Vulnerability (added )
  • CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability (added )