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

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.

Published: 2019-08-15 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-9852 is rated Moderate Risk (51.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.33%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-9852

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-11 0.22% 0.33% +0.12%
2 2026-05-30 0.29% 0.22% -0.07%
3 2026-05-27 — 0.29% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-9852

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2019-9852

OS Trackers for CVE-2019-9852

vendor priority summary link
alpine critical CVE-2019-9852: 1 source package rows (libreoffice); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2019-9852
debian not yet assigned CVE-2019-9852 not yet assigned priority: Debian including 1 source packages (libreoffice), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-9852
redhat medium — https://access.redhat.com/security/cve/CVE-2019-9852
suse high CVE-2019-9852 severity important: SUSE including 840 source package names (libreoffice-6.2.6.2-3.21.1, libreoffice-6.2.6.2-lp150.2.16.1, …), 1037 product×package rows across 21 product lines (SUSE Linux Enterprise Desktop 12 SP4, SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2, … (21 product lines)): Fixed 1037. https://www.suse.com/security/cve/CVE-2019-9852/
ubuntu medium CVE-2019-9852 medium priority: Ubuntu including 1 source packages (libreoffice), 5 status rows across 5 suites (bionic, disco, trusty, upstream, xenial): released 4, DNE 1. https://ubuntu.com/security/CVE-2019-9852

Affected software / configurations for CVE-2019-9852

Vendor Product Version Raw CPE
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 19.04 cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
fedoraproject fedora 29 cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
opensuse leap 15.1 cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
libreoffice libreoffice < 6.2.6 cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*

References for CVE-2019-9852

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