CVE-2017-16903: LvyeCMS through 3.1 allows remote attackers to upload and execute arbitrary PHP code via directory traversal s

Q: How do I fix CVE-2017-16903?

lvyecms: upgrade to newer than 3.1. Exact commands for each OS are on this page.

Q: Is CVE-2017-16903 being exploited?

CVE-2017-16903 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-16903 affect?

CVE-2017-16903 affects lvyecms. Severity is critical (CVSS 9.8). LvyeCMS through 3.1 allows remote attackers to upload and execute arbitrary PHP code via directory traversal sequences in the dir parameter, in conjunction with PHP code in the content parameter, within a template Style add request to index

Q: How urgent is CVE-2017-16903?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2017-16903 is a critical-severity flaw (CVSS 9.8) affecting lvyecms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LvyeCMS through 3.1 allows remote attackers to upload and execute arbitrary PHP code via directory traversal sequences in the dir parameter, in conjunction with PHP code in the content parameter, within a template Style add request to index.php.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-22
Published	2017-11-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: lvyecms project

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

Am I affected?

Timeline

2017-11-20 19:29 UTCPublished CVE record published
2026-06-17 01:10 UTCUpdated Record last modified

lvyecms project lvyecms UPGRADE

Affected: <= 3.1

Fixed in: newer than 3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade lvyecms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lvyecms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2017-16903?

lvyecms: upgrade to newer than 3.1. Exact commands for each OS are on this page.

Is CVE-2017-16903 being exploited?

CVE-2017-16903 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-2017-16903 affect?

CVE-2017-16903 affects lvyecms. Severity is critical (CVSS 9.8). LvyeCMS through 3.1 allows remote attackers to upload and execute arbitrary PHP code via directory traversal sequences in the dir parameter, in conjunction with PHP code in the content parameter, within a template Style add request to index

How urgent is CVE-2017-16903?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2017-16904 MEDIUM 6.1 UPGRADE The Public tologin feature in admin.php in LvyeCMS through 3.1 allows XSS via a crafted username that is misha

References

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