CVE-2018-8805: Yxcms building system (compatible cell phone) v1.4.7 has XSS via the content parameter to protected\apps\defau

Routine

MEDIUM 6.1DOWNGRADE

CVE-2018-8805 is a medium-severity flaw (CVSS 6.1) affecting yxcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Yxcms building system (compatible cell phone) v1.4.7 has XSS via the content parameter to protected\apps\default\view\default\extend_guestbook.php or protected\apps\default\view\mobile\extend_guestbook.php in an index.php?r=default/column/index&col=guestbook request.

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	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-03-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: yxcms

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

Am I affected?

Timeline

2018-03-20 05:29 UTCPublished CVE record published
2026-06-17 02:05 UTCUpdated Record last modified

yxcms yxcms DOWNGRADE

Affected: 1.4.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4.7 (Debian / Ubuntu)

apt-cache madison yxcms sudo apt install yxcms=<VERSION_BEFORE_1.4.7> sudo apt-mark hold yxcms

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

dnf --showduplicates list yxcms sudo dnf downgrade yxcms-<VERSION_BEFORE_1.4.7> sudo dnf versionlock add yxcms

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-2018-8805?

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

Is CVE-2018-8805 being exploited?

CVE-2018-8805 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-2018-8805 affect?

CVE-2018-8805 affects yxcms. Severity is medium (CVSS 6.1). Yxcms building system (compatible cell phone) v1.4.7 has XSS via the content parameter to protected\apps\default\view\default\extend_guestbook.php or protected\apps\default\view\mobile\extend_guestbook.php in an index.php?r=default/column/i

How urgent is CVE-2018-8805?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-8761 HIGH 7.5 DOWNGRADE protected\apps\member\controller\shopcarController.php in Yxcms building system (compatible cell phone) v1.4.7
CVE-2018-19404 HIGH 7.2 DOWNGRADE In YXcms 1.4.7, protected/apps/appmanage/controller/indexController.php allow remote authenticated Administrat
CVE-2018-13025 MEDIUM 4.9 DOWNGRADE protected/apps/admin/controller/photoController.php in YXcms 1.4.7 allows remote attackers to delete arbitrary
CVE-2018-11003 MEDIUM 6.5 DOWNGRADE An issue was discovered in YXcms 1.4.7

References

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