CVE-2018-10230: Zend Debugger in Zend Server before 9.1.3 has XSS, aka ZSR-2455.

Q: How do I fix CVE-2018-10230?

zend server: upgrade to 9.1.3. Exact commands for each OS are on this page.

Q: Is CVE-2018-10230 being exploited?

CVE-2018-10230 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-2018-10230 affect?

CVE-2018-10230 affects zend server. Severity is medium (CVSS 6.1). Zend Debugger in Zend Server before 9.1.3 has XSS, aka ZSR-2455.

Q: How urgent is CVE-2018-10230?

Priority 43/100. No elevated risk signals yet.

This month

MEDIUM 6.1UPGRADE

CVE-2018-10230 is a medium-severity flaw (CVSS 6.1) affecting zend server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Zend Debugger in Zend Server before 9.1.3 has XSS, aka ZSR-2455.

Why this priority

No elevated risk signals yet

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	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-04-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zend

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

Am I affected?

Timeline

2018-04-19 16:29 UTCPublished CVE record published
2026-06-17 01:33 UTCUpdated Record last modified

zend zend server UPGRADE

Affected: < 9.1.3

Fixed in: 9.1.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zend-server || rpm -q zend-server || zend-server --version

2. UPGRADE to 9.1.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zend-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zend-server

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.

Nuclei scan template: Zend Server <9.13 - 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-2018-10230?

zend server: upgrade to 9.1.3. Exact commands for each OS are on this page.

Is CVE-2018-10230 being exploited?

CVE-2018-10230 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-2018-10230 affect?

CVE-2018-10230 affects zend server. Severity is medium (CVSS 6.1). Zend Debugger in Zend Server before 9.1.3 has XSS, aka ZSR-2455.

How urgent is CVE-2018-10230?

Priority 43/100. No elevated risk signals yet.

References

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