pre:

$ cat manifestscan.sh
#!/bin/bash

printf "%-16s|%-8s|%-64s|%-20s\n" "Hostname" "Version" "Jar File" "Class"
for n in $(find / -name *.jar )
do
        CLASS="$(unzip -l $n | grep -i 'jndilookup.class' | awk '{print  $4}' )"
        if [[ -n ${CLASS} ]]; then
                VERSION="$(unzip -q -c $n META-INF/MANIFEST.MF | grep "Log4jReleaseVersion:" | awk '{print $2}' | sed 's/\s//g' )"
        printf "%16s|%8s|%64s|%20s\n" $HOSTNAME $VERSION $n $CLASS
        fi

done

$ ./manifestscan.sh
Hostname        |Version |Jar File                                                        |Class
        hostname|  2.17.0|             /TEST/apache-log4j-2.17.0-bin/log4j-core-2.17.0.jar|org/apache/logging/log4j/core/lookup/JndiLookup.class