CVE-2020-12802 — LibreOffice has a 'stealth mode' in which only documents from locations deemed '

LibreOffice has a 'stealth mode' in which only documents from locations deemed 'trusted' are allowed to retrieve remote resources. This mode is not the default mode, but can be enabled by users who want to disable LibreOffice's ability to include remote r

01What is this vulnerability?

LibreOffice has a 'stealth mode' in which only documents from locations deemed 'trusted' are allowed to retrieve remote resources. This mode is not the default mode, but can be enabled by users who want to disable LibreOffice's ability to include remote resources within a document. A flaw existed where remote graphic links loaded from docx documents were omitted from this protection prior to…

02Affected products

Vendor	Product	Versions
The Document Foundation	LibreOffice	unspecified

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-06-08T15:23:05.479Z
• Last modified: 2024-09-17T04:08:53.179Z

09References

• www.libreoffice.org — https://www.libreoffice.org/about-us/security/advisories/CVE-2020-12802
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00042.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00058.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/12/msg00026.html