What is CVE-2020-8859?

CVE-2020-8859 is a high-severity vulnerability in Elog Electronic Logbook, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-03-23.

How severe is CVE-2020-8859?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Elog Electronic Logbook

CVE-2020-8859

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of ELOG Electronic Logbook 3.1.4-283534d. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of HTTP parameters. A crafted request can trigger the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition. Was ZDI-CAN-10115.

Published 2020-03-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.036 (89.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000

Affected products

Elog Electronic Logbook — versions 3.1.4-283534d
Psi Electronic Logbook — versions 3.1.4-283534d

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.zerodayinitiative.com/advisories/ZDI-20-252/ (VDB Entry, Third Party Advisory)
elog.psi.ch/elogs/Forum/69114 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-8859?: CVE-2020-8859 is a high-severity vulnerability in Elog Electronic Logbook, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2020-03-23.
How severe is CVE-2020-8859?: High severity. CVSS v3 base score is 7.5 out of 10.