CVE-2020-13427: Victor CMS 1.0 has Persistent XSS in admin/users.php?source=add_user via the user_name, user_firstname, or use

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MEDIUM 6.1DOWNGRADE

CVE-2020-13427 is a medium-severity flaw (CVSS 6.1) affecting victorcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Victor CMS 1.0 has Persistent XSS in admin/users.php?source=add_user via the user_name, user_firstname, or user_lastname parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-06-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: victorcms project

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

Am I affected?

Timeline

2020-06-22 18:15 UTCPublished CVE record published
2026-06-17 02:53 UTCUpdated Record last modified

victorcms project victorcms DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison victorcms sudo apt install victorcms=<VERSION_BEFORE_1.0> sudo apt-mark hold victorcms

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

dnf --showduplicates list victorcms sudo dnf downgrade victorcms-<VERSION_BEFORE_1.0> sudo dnf versionlock add victorcms

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-2020-13427?

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

Is CVE-2020-13427 being exploited?

CVE-2020-13427 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-2020-13427 affect?

CVE-2020-13427 affects victorcms. Severity is medium (CVSS 6.1). Victor CMS 1.0 has Persistent XSS in admin/users.php?source=add_user via the user_name, user_firstname, or user_lastname parameter.

How urgent is CVE-2020-13427?

Priority 41/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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