What is CVE-2023-41633?

CVE-2023-41633 is a medium-severity vulnerability in Fossies Catdoc, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2023-09-01.

How severe is CVE-2023-41633?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Fossies Catdoc

CVE-2023-41633

Catdoc v0.95 was discovered to contain a NULL pointer dereference via the component xls2csv at src/fileutil.c.

Published 2023-09-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (11.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Fossies Catdoc — versions 0.95

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

rycbar77.github.io/2023/08/29/catdoc-0-95-nullptr-dereference/ (Broken Link)
gist.github.com/rycbar77/3da455382f88cfb6d6798572f34378bd (Third Party Advisory)

Frequently asked questions

What is CVE-2023-41633?: CVE-2023-41633 is a medium-severity vulnerability in Fossies Catdoc, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2023-09-01.
How severe is CVE-2023-41633?: Medium severity. CVSS v3 base score is 5.5 out of 10.