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CVE-2020-17530: Apache Struts Remote Code Execution Vulnerability

criticalknown exploitedpublic exploitCVE-2020-17530
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Forced Object-Graph Navigation Language (OGNL) evaluation in Apache Struts, when evaluated on raw user input in tag attributes, can lead to remote code execution.

CSIRTS triage

vendor: Apacheproduct: StrutsRemote code execution
What
This vulnerability allows for remote code execution through forced OGNL evaluation on raw user input.
Who is affected
Deployments of Apache Struts.
Urgency
Immediate action is necessary as the vulnerability is actively exploited and rated critical.
Action
Patch Apache Struts to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-17530

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2020-17530coverage & exploitation statusNVD · CVE.org

Recent advisories for Apache Struts Remote

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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