Insufficient URL decoding flaw in categorizing macro location

Description

LibreOffice documents can contain macros. The execution of those macros is controlled by the document security settings, typically execution of macros are blocked by default. A URL decoding flaw existed in how the urls to the macros within the document were processed and categorized, resulting in the possibility to construct a document where macro execution bypassed the security settings. The documents were correctly detected as containing macros, and prompted the user to their existence within the documents, but macros within the document were subsequently not controlled by the security settings allowing arbitrary macro execution This issue affects: LibreOffice 6.2 series versions prior to 6.2.7; LibreOffice 6.3 series versions prior to 6.3.1.

Scores

EPSS (exploitation in 30 days)

3.1% · top 12% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

• CWE-116 Improper Encoding or Escaping of Output (opens in a new tab)All about CWE-116 and its CVEs

Affected products

• Document Foundation · LibreOffice

  • affected 6.2 series – < 6.2.7
  • affected 6.3 series – < 6.3.1

References (17)

• https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9853/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• [debian-lts-announce] 20191006 [SECURITY] [DLA 1947-1] libreoffice security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• FEDORA-2019-4b0cc75996 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• [openoffice-commits] 20191016 svn commit: r1051583 - in /websites/staging/ooo-site/trunk: cgi-bin/ content/ content/security/cves/CVE-2019-9853.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191016 svn commit: r1868517 - /openoffice/ooo-site/trunk/content/security/cves/CVE-2019-9853.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191016 svn commit: r1868522 - /openoffice/ooo-site/trunk/content/security/bulletin.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191124 svn commit: r1870322 - /openoffice/ooo-site/trunk/content/security/cves/CVE-2019-9853.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191124 svn commit: r1053264 - in /websites/staging/ooo-site/trunk: cgi-bin/ content/ content/security/cves/CVE-2019-9853.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191124 svn commit: r1053267 - in /websites/staging/ooo-site/trunk: cgi-bin/ content/ content/security/cves/CVE-2019-9853.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191124 svn commit: r1870324 - /openoffice/ooo-site/trunk/content/security/cves/CVE-2019-9853.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191124 svn commit: r1870337 - in /openoffice/ooo-site/trunk/content/security/cves: CVE-2019-9853.html CVE-XXXX-YYYY.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191124 svn commit: r1053270 - in /websites/staging/ooo-site/trunk: cgi-bin/ content/ content/security/cves/CVE-2019-9853.html content/security/cves/CVE-XXXX-YYYY.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191124 svn commit: r1053271 - in /websites/staging/ooo-site/trunk: cgi-bin/ content/ content/security/cves/CVE-2019-9853.html content/security/cves/CVE-XXXX-YYYY.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [openoffice-commits] 20191124 svn commit: r1870336 - in /openoffice/ooo-site/trunk/content/security/cves: CVE-2019-9853.html CVE-XXXX-YYYY.html (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• openSUSE-SU-2019:2709 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 20200220 Open-Xchange Security Advisory 2020-02-19 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
• http://packetstormsecurity.com/files/156474/Open-Xchange-App-Suite-Documents-Server-Side-Request-Forgery.html (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-9853](https://trackcve.app/badge/CVE-2019-9853.svg)](https://trackcve.app/cve/CVE-2019-9853)

Record last updated 16 Sept 2024, 17:17 UTC.