The Windows symbol server set up as requested in bug 50350 is boon to those who want to debug libreoffice, triage crashes, or do profiling. However the symbol server poses a security risk to all who use it. Symbols are served up over insecure http and could be modified in flight by a malicious third party. This could include adding carefully crafted corruptions (most PDB parsers are *not* securely written or well tested against malicious inputs) or adding malicious source indexing commands. Either technique could easily be used to execute arbitrary code on developer's machines.
Because the symbols served up by libreoffice contain private symbols, including source file information, adding a malicious source indexing stream is a trivial operation and most debuggers are configured to execute the commands within without asking the user.
Here is the bug that originally added symbol server support:
Sounds like a reasonable enhancement request.
Status -> NEW
Ci-infra bugs are now tracked in redmine. Redmine bug #1121
Closing this bug as MOVED.