CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2021-31805
Critical (9.8) in apache struts. EPSS 85% chance of exploitation in the next 30 days. Fixed in org.apache.struts:struts2-core 2.5.30.
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.
Severity
- EPSS
- 85% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CWE
- CWE-917
- Published
- Modified
- Record from
- the NVD, synced
Affected
- apache:struts
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-v8j6-6c2r-r27c | Maven | org.apache.struts:struts2-core | >=2.0.0 <2.5.30 | 2.5.30 |