Thanks Yasser for taking care of this and being so patient with the
whole process :)


Kind regards
--
Łukasz
+ 48 606 323 122 http://www.lenart.org.pl/

wt., 12 kwi 2022 o 17:15 Yasser Zamani <yasserzam...@apache.org> napisał(a):
>
> 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.
>
> Mitigation:
>
> Avoid using forced OGNL evaluation on untrusted user input, and/or upgrade to 
> Struts 2.5.30 which checks if expression evaluation won’t lead to the double 
> evaluation.
>
> Please read our Security Bulletin S2-062 for more details.
>
> Credit:
>
> Apache Struts would like to thank Chris McCown for reporting this issue!
>
> References:
>
> https://cwiki.apache.org/confluence/display/WW/S2-062
>
>
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