CVE-2018-7547: lyadmin 1.x has XSS via the config[WEB_SITE_TITLE] parameter to the /admin.php?s=/admin/config/groupsave.html

Routine

MEDIUM 4.8UPGRADE

CVE-2018-7547 is a medium-severity flaw (CVSS 4.8) affecting lyadmin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

lyadmin 1.x has XSS via the config[WEB_SITE_TITLE] parameter to the /admin.php?s=/admin/config/groupsave.html URI.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-02-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: lingyun

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

Am I affected?

Timeline

2018-02-27 21:29 UTCPublished CVE record published
2026-06-17 02:03 UTCUpdated Record last modified

lingyun lyadmin UPGRADE

Affected: >= 1.0.0 and <= 1.2.0

Fixed in: newer than 1.2.0

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. UPGRADE to newer than 1.2.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lyadmin

Note

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

3. If no update is available yet, DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison lyadmin sudo apt install lyadmin=<VERSION_BEFORE_1.0.0> sudo apt-mark hold lyadmin

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list lyadmin sudo dnf downgrade lyadmin-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add lyadmin

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-2018-7547?

lyadmin: upgrade to newer than 1.2.0. Exact commands for each OS are on this page.

Is CVE-2018-7547 being exploited?

CVE-2018-7547 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-2018-7547 affect?

CVE-2018-7547 affects lyadmin. Severity is medium (CVSS 4.8). lyadmin 1.x has XSS via the config[WEB_SITE_TITLE] parameter to the /admin.php?s=/admin/config/groupsave.html URI.

How urgent is CVE-2018-7547?

Priority 33/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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