CVE-2021-31805 is a vulnerability that was identified in certain software systems, which refers to a flaw or weakness in the software's design, implementation, or the actions of individuals involved. This particular vulnerability was discovered in 2021, but it's important to note that my knowledge cutoff is in September 2021, and I may not have information regarding specific events that occurred after that date.
As for what happened when CVE-2021-31805 was discovered, the exact details would depend on the specific software affected by this vulnerability. When vulnerabilities are identified, they are typically reported to the relevant software vendor or developer so that they can develop and release a patch or update to address the issue. The response to CVE-2021-31805 would vary depending on how critical the vulnerability was, the level of impact it could have on users or systems, and the urgency with which it needed to be addressed. It is likely that the software vendor or developer released a security patch or update to mitigate the vulnerability and advised users to apply the fix as soon as possible to protect their systems from potential exploitation.