What is CVE-2020-25031?

CVE-2020-25031 is a high-severity vulnerability in Canonical Checkinstall, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2020-08-31.

How severe is CVE-2020-25031?

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

Vulnerability in Canonical Checkinstall

CVE-2020-25031

checkinstall 1.6.2, when used to create a package that contains a symlink, may trigger the creation of a mode 0777 executable file.

Published 2020-08-31 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.005 (43.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Canonical Checkinstall — versions 1.6.2

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

bugs.launchpad.net/ubuntu/+source/checkinstall/+bug/1861281 (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2020-25031?: CVE-2020-25031 is a high-severity vulnerability in Canonical Checkinstall, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2020-08-31.
How severe is CVE-2020-25031?: High severity. CVSS v3 base score is 7.8 out of 10.