GHSA-x5fc-pgpx-59j5

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GHSA-x5fc-pgpx-59j5

Summary: Server side object manipulation in Apache Struts

Details: OGNL provides, among other features, extensive expression evaluation capabilities. This vulnerability allows a malicious user to bypass the '#'-usage protection built into the ParametersInterceptor, thus being able to manipulate server side context objects. This behavior was already addressed in [S2-003](https://cwiki.apache.org/confluence/display/WW/S2-003), but it turned out that the resulting fix based on whitelisting acceptable parameter names closed the vulnerability only partially.

References: https://nvd.nist.gov/vuln/detail/CVE-2010-1870, https://cwiki.apache.org/confluence/display/WW/S2-003, https://github.com/apache/struts, http://blog.o0o.nu/2010/07/cve-2010-1870-struts2xwork-remote.html, http://confluence.atlassian.com/display/FISHEYE/FishEye+Security+Advisory+2010-06-16, http://packetstormsecurity.com/files/159643/LISTSERV-Maestro-9.0-8-Remote-Code-Execution.html, http://seclists.org/fulldisclosure/2010/Jul/183, http://seclists.org/fulldisclosure/2020/Oct/23, http://struts.apache.org/2.2.1/docs/s2-005.html, http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140709-struts2