https://bugs.documentfoundation.org/show_bug.cgi?id=128498

--- Comment #15 from Stephan Bergmann <sberg...@redhat.com> ---
(In reply to vatairethibault from comment #14)
> Ok, I understand now how link update works :
> Global settings take precedence over document settings (so LibreOffice
> always ignore the "LinkUpdateMode" document setting), and when "Always" is
> selected in global settings, links are only updated if the document is in a
> trusted file location (see Security > Macros security > Trusted sources >
> Trusted file locations).

The relevant commit
<https://git.libreoffice.org/core/+/59f9a0de39e4356220705bb6c4be66c956dc9c6d%5E%21>
"LinkUpdateMode is a global setting" was a mitigation for
<https://www.libreoffice.org/about-us/security/advisories/cve-2015-4551/>
"CVE-2015-4551 Arbitrary file disclosure in Calc and Writer".  From my
private/security notes from back then:

"I have available a fix for LibreOffice that treats a document's 'always
update links' setting as if it rather were 'ask to update links' in Calc
and Writer unless

"(1) 'Tools - Options... - LibreOffice - Security - Macro Security... -
Security Level - Low (not recommended)' is selected; or

"(2) the document matches any of the 'Tools - Options... - LibreOffice -
Security - Macro Security... - Trusted Sources - Trusted File Locations.'

"That is probably a good compromise to make the new behavior actually
kick in for users, but without hampering considered-to-be-secure
scenarios with additional dialogs."

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