CVE-2020-26507: A CSV Injection (also known as Formula Injection) vulnerability in the Marmind web application with version 4.

This month

HIGH 7.8DOWNGRADE

CVE-2020-26507 is a high-severity flaw (CVSS 7.8) affecting marmind. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A CSV Injection (also known as Formula Injection) vulnerability in the Marmind web application with version 4.1.141.0 allows malicious users to gain remote control of other computers. By providing formula code in the “Notes” functionality in the main screen, an attacker can inject a payload into the “Description” field under the “Insert To-Do” option. Other users might download this data, for example a CSV file, and execute the malicious commands

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-1236
Published	2020-11-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: marmind

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

Am I affected?

Timeline

2020-11-05 18:15 UTCPublished CVE record published
2026-06-17 03:08 UTCUpdated Record last modified

marmind marmind DOWNGRADE

Affected: 4.1.141.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.1.141.0

1. Check installed version

apt-cache policy marmind || rpm -q marmind || marmind --version

2. No fixed release: DOWNGRADE to a release before 4.1.141.0 (Debian / Ubuntu)

apt-cache madison marmind sudo apt install marmind=<VERSION_BEFORE_4.1.141.0> sudo apt-mark hold marmind

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

dnf --showduplicates list marmind sudo dnf downgrade marmind-<VERSION_BEFORE_4.1.141.0> sudo dnf versionlock add marmind

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-2020-26507?

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

Is CVE-2020-26507 being exploited?

CVE-2020-26507 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-2020-26507 affect?

CVE-2020-26507 affects marmind. Severity is high (CVSS 7.8). A CSV Injection (also known as Formula Injection) vulnerability in the Marmind web application with version 4.1.141.0 allows malicious users to gain remote control of other computers. By providing formula code in the “Notes” functionality i

How urgent is CVE-2020-26507?

Priority 48/100. High severity; Public exploit reference

Related CVEs

CVE-2020-26506 MEDIUM 4.3 DOWNGRADE An Authorization Bypass vulnerability in the Marmind web application with version 4.1.141.0 allows users with
CVE-2020-26505 MEDIUM 6.1 DOWNGRADE A Stored Cross-Site Scripting (XSS) vulnerability in the “Marmind” web application with version 4.1.141.0 allo

References

← Back to latest CVEs