cpie.php in XCMS 1.83 and earlier sends a redirect to the web browser but does not exit, which allows remote attackers to conduct direct static code injection attacks and execute arbitrary code via the testo_0 parameter in a cpie admin action to index.php, which writes to dati/generali/footer.dtb (aka the XCMS footer).
Exploitability
AV:NAC:LAu:NImpact
C:PI:PA:P7.5/AV:N/AC:L/Au:N/C:P/I:P/A:P