CVE-2020-14414: NeDi 1.9C is vulnerable to Remote Command Execution

This month

HIGH 8.8DOWNGRADE

CVE-2020-14414 is a high-severity flaw (CVSS 8.8) affecting nedi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NeDi 1.9C is vulnerable to Remote Command Execution. pwsec.php improperly escapes shell metacharacters from a POST request. An attacker can exploit this by crafting an arbitrary payload (any system commands) that contains shell metacharacters via a POST request with a pw parameter. (This can also be exploited via CSRF.)

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	3.7% (top 10%)
CISA exploited list	No
Weakness	CWE-78
Published	2020-06-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: nedi

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

Am I affected?

Timeline

2020-06-29 17:15 UTCPublished CVE record published
2026-06-17 02:54 UTCUpdated Record last modified

nedi nedi DOWNGRADE

Affected: 1.9c

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.9c

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.9c (Debian / Ubuntu)

apt-cache madison nedi sudo apt install nedi=<VERSION_BEFORE_1.9c> sudo apt-mark hold nedi

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

dnf --showduplicates list nedi sudo dnf downgrade nedi-<VERSION_BEFORE_1.9c> sudo dnf versionlock add nedi

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-2020-14414?

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

Is CVE-2020-14414 being exploited?

CVE-2020-14414 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-2020-14414 affect?

CVE-2020-14414 affects nedi. Severity is high (CVSS 8.8). NeDi 1.9C is vulnerable to Remote Command Execution. pwsec.php improperly escapes shell metacharacters from a POST request. An attacker can exploit this by crafting an arbitrary payload (any system commands) that contains shell metacharacte

How urgent is CVE-2020-14414?

Priority 53/100. High severity

Software pages

PHP vulnerabilities

Related CVEs

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CVE-2020-15037 MEDIUM 5.4 DOWNGRADE NeDi 1.9C is vulnerable to cross-site scripting (XSS) attack

References

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