CVE-2018-9330: register.jsp in Coremail XT3.0 allows stored XSS, as demonstrated by the third form field to a URI under regis

Routine

MEDIUM 5.4DOWNGRADE

CVE-2018-9330 is a medium-severity flaw (CVSS 5.4) affecting coremail xt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

register.jsp in Coremail XT3.0 allows stored XSS, as demonstrated by the third form field to a URI under register/, a different vulnerability than CVE-2015-6942.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-04-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: coremail

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

Am I affected?

Timeline

2018-04-07 17:29 UTCPublished CVE record published
2026-06-17 02:06 UTCUpdated Record last modified

coremail coremail xt DOWNGRADE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

apt-cache policy coremail-xt || rpm -q coremail-xt || coremail-xt --version

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison coremail-xt sudo apt install coremail-xt=<VERSION_BEFORE_3.0> sudo apt-mark hold coremail-xt

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

dnf --showduplicates list coremail-xt sudo dnf downgrade coremail-xt-<VERSION_BEFORE_3.0> sudo dnf versionlock add coremail-xt

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-2018-9330?

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

Is CVE-2018-9330 being exploited?

CVE-2018-9330 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-2018-9330 affect?

CVE-2018-9330 affects coremail xt. Severity is medium (CVSS 5.4). register.jsp in Coremail XT3.0 allows stored XSS, as demonstrated by the third form field to a URI under register/, a different vulnerability than CVE-2015-6942.

How urgent is CVE-2018-9330?

Priority 35/100. Public exploit reference

Related CVEs

CVE-2020-29133 MEDIUM 6.1 DOWNGRADE jsp/upload.jsp in Coremail XT 5.0 allows XSS via an uploaded personal signature, as demonstrated by a .jpg.htm
CVE-2018-14503 MEDIUM 6.1 DOWNGRADE Cross-site scripting (XSS) vulnerability in intervalCheck.jsp in Coremail XT 3.0 allows remote attackers to in
CVE-2015-6942 MEDIUM 6.1 DOWNGRADE Cross-site scripting (XSS) vulnerability in Coremail XT3.0 allows remote attackers to inject arbitrary web scr

References

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