CVE-2020-8859: This vulnerability allows remote attackers to create a denial-of-service condition on affected installations o

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HIGH 7.5REMOTEDOWNGRADE

CVE-2020-8859 is a high-severity flaw (CVSS 7.5) affecting electronic logbook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.6% (top 11%)
CISA exploited list	No
Weakness	CWE-476
Published	2020-03-23
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: psi

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-03-23 21:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

psi electronic logbook DOWNGRADE

Affected: 3.1.4-283534d

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1.4-283534d

1. Check installed version

apt-cache policy electronic-logbook || rpm -q electronic-logbook || electronic-logbook --version

2. No fixed release: DOWNGRADE to a release before 3.1.4-283534d (Debian / Ubuntu)

apt-cache madison electronic-logbook sudo apt install electronic-logbook=<VERSION_BEFORE_3.1.4-283534d> sudo apt-mark hold electronic-logbook

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list electronic-logbook sudo dnf downgrade electronic-logbook-<VERSION_BEFORE_3.1.4-283534d> sudo dnf versionlock add electronic-logbook

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-8859?

electronic logbook: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-8859 being exploited?

CVE-2020-8859 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-8859 affect?

CVE-2020-8859 affects electronic logbook. Severity is high (CVSS 7.5). 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 wi

How urgent is CVE-2020-8859?

Priority 54/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-20376 MEDIUM 6.1 DOWNGRADE A cross-site scripting (XSS) vulnerability in Electronic Logbook (ELOG) 3.1.4 allows remote attackers to injec
CVE-2019-20375 MEDIUM 6.1 DOWNGRADE A cross-site scripting (XSS) vulnerability in Electronic Logbook (ELOG) 3.1.4 allows remote attackers to injec

References

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