CVE-2018-11628: Data input into EMS Master Calendar before 8.0.0.201805210 via URL parameters is not properly sanitized, allow

Q: How do I fix CVE-2018-11628?

ems master calendar: upgrade to 8.0.0.201805210. Exact commands for each OS are on this page.

Q: Is CVE-2018-11628 being exploited?

CVE-2018-11628 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-2018-11628 affect?

CVE-2018-11628 affects ems master calendar. Severity is medium (CVSS 6.1). Data input into EMS Master Calendar before 8.0.0.201805210 via URL parameters is not properly sanitized, allowing malicious attackers to send a crafted URL for XSS.

Q: How urgent is CVE-2018-11628?

Priority 49/100. Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2018-11628 is a medium-severity flaw (CVSS 6.1) affecting ems master calendar. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Data input into EMS Master Calendar before 8.0.0.201805210 via URL parameters is not properly sanitized, allowing malicious attackers to send a crafted URL for XSS.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	3.4% (top 11%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-06-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: emssoftware

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

Am I affected?

Timeline

2018-06-01 15:29 UTCPublished CVE record published
2026-06-17 01:36 UTCUpdated Record last modified

emssoftware ems master calendar UPGRADE

Affected: < 8.0.0.201805210

Fixed in: 8.0.0.201805210

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ems-master-calendar || rpm -q ems-master-calendar || ems-master-calendar --version

2. UPGRADE to 8.0.0.201805210 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ems-master-calendar

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ems-master-calendar

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: EMS Master Calendar < 8.0.0.20180520 - Cross-Site Scripting

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-2018-11628?

ems master calendar: upgrade to 8.0.0.201805210. Exact commands for each OS are on this page.

Is CVE-2018-11628 being exploited?

CVE-2018-11628 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-2018-11628 affect?

CVE-2018-11628 affects ems master calendar. Severity is medium (CVSS 6.1). Data input into EMS Master Calendar before 8.0.0.201805210 via URL parameters is not properly sanitized, allowing malicious attackers to send a crafted URL for XSS.

How urgent is CVE-2018-11628?

Priority 49/100. Public exploit reference

References

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