Hi! Thanks for reply ??
Yes, last night I installed again FSCF, the last version, of course. I constantly checked access.log and continued finding requests to si-contact-form/captcha/securimage_show.php. I uninstalled after a few hours and used the and used the Remove URLs Tool of the Google Webmaster Tools, and now still appearing the same requests. For example:
66.249.66.132 – – [17/Feb/2016:13:42:47 +0100] “GET /wp-content/plugins/si-contact-form/captcha/securimage_show.php?ctf_sm_captcha=1&prefix=7Lhu6NtTl3PIIx7o HTTP/1.0” 404 19637 “-” “Googlebot-Image/1.0”
40.77.167.41 – – [17/Feb/2016:14:49:09 +0100] “GET /wp-content/plugins/si-contact-form/captcha/securimage_show.php?ctf_sm_captcha=1&prefix=s5meMlVM3zo2xQZG HTTP/1.0” 404 19675 “-” “Mozilla/5.0 (compatible; bingbot/2.0; +https://www.bing.com/bingbot.htm)”
I reviewed when it was uninstalled FSCF was approximately October-November 2015 ??