Comment 11 for bug 1939678

Hello Paride,

for a kinde of integrity i did the same with the ubuntu 20.04 Apache.

:~$ apt-get source apache2
:~$ cp apache2-2.4.41/modules/proxy/mod_proxy_balancer.c .
:~$ vim mod_proxy_balancer.c
[...]
    /* Ignore parameters if this looks like XSRF */
    ref = apr_table_get(r->headers_in, "Referer");
    if (apr_table_elts(params)
        && (!ref || !safe_referer(r, ref))) {
        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10187)
                      "ignoring params in balancer-manager cross-site access");
        apr_table_clear(params);
    }
[...]

Delete that part and compile the module only

:~# apxs2 -c -i mod_proxy_balancer.c

:~# systemctl restart apache2

And it looks like for me everything ist working again as expected. But also the I'am a non Developer hint and mybe this todo so is a really bad idea.

Thx Horst