What’s Vulnerable › Vulnerabilities

CVE-2021-31805: Forced OGNL evaluation, when evaluated on raw not validated user input in tag attributes, may lead to RCE.

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 85.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-04-12 · updated 2026-06-17
• Weakness: CWE-917

Description

The fix issued for CVE-2020-17530 was incomplete. So from Apache Struts 2.0.0 to 2.5.29, still some of the tag’s attributes could perform a double evaluation if a developer applied forced OGNL evaluation by using the %{...} syntax. Using forced OGNL evaluation on untrusted user input can lead to a Remote Code Execution and security degradation.

Affected products

• Apache Struts: from 2.0.0 through 2.5.29

References

• http://www.openwall.com/lists/oss-security/2022/04/12/6
• https://cwiki.apache.org/confluence/display/WW/S2-062
• https://security.netapp.com/advisory/ntap-20220420-0001/
• https://www.oracle.com/security-alerts/cpujul2022.html
• http://www.openwall.com/lists/oss-security/2022/04/12/6
• https://cwiki.apache.org/confluence/display/WW/S2-062
• https://security.netapp.com/advisory/ntap-20220420-0001/
• https://www.oracle.com/security-alerts/cpujul2022.html

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