Thank you to the dev team for the excellent work and to Lukasz for the 2.5 -> 6 
migration page.

I wanted to make a contribution to the wiki regarding an upgrade issue we 
encountered on an older system during our move from 2.5 to 6.7 due to the file 
upload path traversal vulnerability.

I didn't find a new account page on the Apache Confluence to request an account 
or I'd be happy to do it myself.

Our finding was that Struts OGNL expressions gained an imposed default maximum 
length of 256 characters at some point between 2.5 -> 6, and in order to avoid 
broken functionality from the upgrade, we had to add 
struts.ognl.expressionMaxLength constant to our struts.xml and set it to 
something slightly longer.

https://struts.apache.org/security/#apply-a-maximum-allowed-length-on-ognl-expressions

How can I get a wiki account to mention it, or would someone rather update the 
migration page to mention it as a potential issue?

Thanks so much!
-Scott

Scott Hiland



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