CVE-2020-19303: An arbitrary file upload vulnerability in /fileupload.php of hdcms 5.7 allows attackers to execute arbitrary c

This month

HIGH 7.8DOWNGRADE

CVE-2020-19303 is a high-severity flaw (CVSS 7.8) affecting hdcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An arbitrary file upload vulnerability in /fileupload.php of hdcms 5.7 allows attackers to execute arbitrary code via a crafted file.

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	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-434
Published	2021-08-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: houdunren

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

Am I affected?

Timeline

2021-08-03 22:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

houdunren hdcms DOWNGRADE

Affected: 5.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.7 (Debian / Ubuntu)

apt-cache madison hdcms sudo apt install hdcms=<VERSION_BEFORE_5.7> sudo apt-mark hold hdcms

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

dnf --showduplicates list hdcms sudo dnf downgrade hdcms-<VERSION_BEFORE_5.7> sudo dnf versionlock add hdcms

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-2020-19303?

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

Is CVE-2020-19303 being exploited?

CVE-2020-19303 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-2020-19303 affect?

CVE-2020-19303 affects hdcms. Severity is high (CVSS 7.8). An arbitrary file upload vulnerability in /fileupload.php of hdcms 5.7 allows attackers to execute arbitrary code via a crafted file.

How urgent is CVE-2020-19303?

Priority 50/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

References

← Back to latest CVEs