CVE-2019-18419: A cross-site scripting (XSS) vulnerability in index.php in ClonOS WEB control panel 19.09 allows remote attack

This month

MEDIUM 6.1MITIGATE

CVE-2019-18419 is a medium-severity flaw (CVSS 6.1) affecting clonos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site scripting (XSS) vulnerability in index.php in ClonOS WEB control panel 19.09 allows remote attackers to inject arbitrary web script or HTML via the lang 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	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-10-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: clonos

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

Am I affected?

Timeline

2019-10-24 19:15 UTCPublished CVE record published
2026-06-17 02:25 UTCUpdated Record last modified

clonos clonos MITIGATE

Affected: 19.09

Fixed in: no fixed release known

Safe to downgrade to: a release before 19.09

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2019-18419?

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

Is CVE-2019-18419 being exploited?

CVE-2019-18419 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-2019-18419 affect?

CVE-2019-18419 affects clonos. Severity is medium (CVSS 6.1). A cross-site scripting (XSS) vulnerability in index.php in ClonOS WEB control panel 19.09 allows remote attackers to inject arbitrary web script or HTML via the lang parameter.

How urgent is CVE-2019-18419?

Priority 41/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2019-18418 CRITICAL 9.8 MITIGATE clonos.php in ClonOS WEB control panel 19.09 allows remote attackers to gain full access via change password r
CVE-2019-15571 CRITICAL 9.8 UPGRADE The WEB control panel before 2019-04-30 for ClonOS allows SQL injection in clonos.php.

References

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