CVE-2020-20718: File Upload vulnerability in PluckCMS v.4.7.10 dev versions allows a remote attacker to execute arbitrary code

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-20718 is a critical-severity flaw (CVSS 9.8) affecting pluckcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

File Upload vulnerability in PluckCMS v.4.7.10 dev versions allows a remote attacker to execute arbitrary code via a crafted image file to the the save_file() parameter.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-06-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pluck-cms

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

Am I affected?

Timeline

2023-06-20 15:15 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

pluck-cms pluckcms DOWNGRADE

Affected: 4.7.10 dev

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.7.10

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.7.10 (Debian / Ubuntu)

apt-cache madison pluckcms sudo apt install pluckcms=<VERSION_BEFORE_4.7.10> sudo apt-mark hold pluckcms

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

dnf --showduplicates list pluckcms sudo dnf downgrade pluckcms-<VERSION_BEFORE_4.7.10> sudo dnf versionlock add pluckcms

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-2020-20718?

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

Is CVE-2020-20718 being exploited?

CVE-2020-20718 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-2020-20718 affect?

CVE-2020-20718 affects pluckcms. Severity is critical (CVSS 9.8). File Upload vulnerability in PluckCMS v.4.7.10 dev versions allows a remote attacker to execute arbitrary code via a crafted image file to the the save_file() parameter.

How urgent is CVE-2020-20718?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-1010062 CRITICAL 9.8 UPGRADE PluckCMS 4.7.4 and earlier is affected by: CWE-434 Unrestricted Upload of File with Dangerous Type

References

← Back to latest CVEs