What is CVE-2023-0950?

CVE-2023-0950 is a high-severity vulnerability in Libreoffice, classified under Improper Validation of Array Index. CVSS score: 7.8/10. Published 2023-05-25.

How severe is CVE-2023-0950?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2023-0950 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Libreoffice

CVE-2023-0950

Improper Validation of Array Index vulnerability in the spreadsheet component of The Document Foundation LibreOffice allows an attacker to craft a spreadsheet document that will cause an array index underflow when loaded. In the affected versions of LibreOffice certain malformed spreadsheet formulas, such as AGGREGATE, could be created with less parameters passed to the formula interpreter than it expected, leading to an array index underflow, in which case there is a risk that arbitrary code could be executed. This issue affects: The Document Foundation LibreOffice 7.4 versions prior to 7.4.6; 7.5 versions prior to 7.5.1.

Published 2023-05-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (20.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Libreoffice
The Document Foundation Libreoffice — versions 7.4, 7.5
Debian Linux — versions 10.0

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

www.libreoffice.org/about-us/security/advisories/CVE-2023-0950 (Vendor Advisory)
www.debian.org/security/2023/dsa-5415 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2023/08/msg00014.html (mailing-list)
security.gentoo.org/glsa/202311-15 (vendor-advisory)

Frequently asked questions

What is CVE-2023-0950?: CVE-2023-0950 is a high-severity vulnerability in Libreoffice, classified under Improper Validation of Array Index. CVSS score: 7.8/10. Published 2023-05-25.
How severe is CVE-2023-0950?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2023-0950 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.