| Package | Affected versions | Patched versions |
|---|---|---|
| org.apache.struts:struts2-core | ≥ 2.0.0, < 2.5.30 | 2.5.30 |
| struts | ≥ 2.0.0, ≤ 2.5.29 |
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.
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