Exploited vulnerability · CISA KEV

Is CVE-2013-2251 exploited? Yes: in CISA KEV since 25 Mar 2022

Gociux · Apache Struts · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2013-2251, Apache Struts Improper Input Validation Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 25 Mar 2022, 3172 days after it was published. It affects Apache Struts. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 25 Mar 2022

ransomwareNot knownno confirmed use

EPSStop 1%among the most likely CVEs to be exploited

severity9.8CVSS 3.1 · critical

US federal due15 Apr 2022BOD 22-01 deadline

What it is

Apache Struts allows remote attackers to execute arbitrary Object-Graph Navigation Language (OGNL) expressions.

Vendor	Apache (41 exploited CVEs in KEV)
Product	Struts
Vulnerability	Apache Struts Improper Input Validation Vulnerability
Weakness	CWE-20
Published	18 Jul 2013
Added to KEV	25 Mar 2022
Reported by (CNA)	redhat

What to do

Check whether you run it. Look for Struts in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apache CVE at once.
Apply the fix. Apply updates per vendor instructions.
If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 18 Jul 2013.
Get told next time. Email alerts when CISA adds a CVE for Apache.

Other exploited CVEs in Struts

CVE-2016-3081: Apache Struts Command Injection Vulnerability (8 Oct 2026)
CVE-2017-9805: Apache Struts Deserialization of Untrusted Data Vulnerability (3 Nov 2021)
CVE-2020-17530: Apache Struts Remote Code Execution Vulnerability (3 Nov 2021)
CVE-2017-5638: Apache Struts Remote Code Execution Vulnerability (3 Nov 2021)
CVE-2018-11776: Apache Struts Remote Code Execution Vulnerability (3 Nov 2021)

References

nvd.nist.gov/vuln/detail/CVE-2013-2251

Questions

Is CVE-2013-2251 being exploited?

Yes. CISA added CVE-2013-2251 to the Known Exploited Vulnerabilities catalog on 25 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2013-2251 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2013-2251?

Apply updates per vendor instructions. Check Apache's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Struts and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2022 · Apache scorecard · act-now radar.

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