Forced OGNL evaluation, when evaluated on raw not validated user input in tag attributes, may lead to RCE.
Priority HIGH 84CWE-917Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-917.
Summary
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.
Why it matters now
EPSS 0.85433 99th percentileScored 2026-11-07
Fix Fixed org.apache.struts:struts2-core (Maven): 2.5.30
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Struts | 2.0.0 to 2.5.29 | — | No fix listed | CNA |
| — | org.apache.struts:struts2-core (Maven) | 2.0.0 to before 2.5.30 | 2.5.30 | Patch available | GHSA-v8j6-6c2r-r27c |
- Apache Struts VendorApache Affected 2.0.0 to 2.5.29 Fixed in — No fix listed CNA
- org.apache.struts:struts2-core (Maven) Vendor— Affected 2.0.0 to before 2.5.30 Fixed in 2.5.30 Patch available GHSA-v8j6-6c2r-r27c
Remediation
- Fix · GHSA-v8j6-6c2r-r27c org.apache.struts:struts2-core (Maven) Fixed in 2.5.30 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 3 products
- Red Hat JBoss Fuse 6
- Red Hat JBoss Fuse Service Works 6
- Red Hat JBoss Operations Network 3
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31805
- 2026-10-03 Alias added: GHSA-v8j6-6c2r-r27c
References
Advisory 3
More Apache Struts vulnerabilities
- TI-2020-13278 Expression language injection in Apache Struts KEVCVSS 3.1CRITICAL 9.8
- TI-2017-07171 Improper input validation in Apache Struts KEVCVSS 3.1CRITICAL 9.8
- TI-2017-03639 Improper handling of exceptional conditions in Apache Struts KEVCVSS 3.1CRITICAL 9.8
- TI-2013-02013 Apache Struts 2.0.0 through 2.3.15 allows remote attackers to execute arbitrary OGNL… KEVCVSS 3.1CRITICAL 9.8
- TI-2012-00357 The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter… KEVCVSS 3.1CRITICAL 9.8
- TI-2018-08433 Improper input validation in Apache Struts KEVCVSS 3.1HIGH 8.1
Sources
- CVE-2021-31805 · CVE Program
- CVE-2021-31805 · NVD
- FIRST EPSS
- GHSA-v8j6-6c2r-r27c · GitHub Advisory Database · CC BY 4.0
- CVE-2021-31805 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences