CVE-2019-9558: Mailtraq WebMail version 2.17.7.3550 has Persistent Cross Site Scripting (XSS) via the body of an e-mail messa

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MEDIUM 6.1DOWNGRADE

CVE-2019-9558 is a medium-severity flaw (CVSS 6.1) affecting webmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mailtraq WebMail version 2.17.7.3550 has Persistent Cross Site Scripting (XSS) via the body of an e-mail message. To exploit the vulnerability, the victim must open an email with malicious Javascript inserted into the body of the email as an iframe.

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	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-03-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mailtraq

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

Am I affected?

Timeline

2019-03-12 20:29 UTCPublished CVE record published
2026-06-17 02:43 UTCUpdated Record last modified

mailtraq webmail DOWNGRADE

Affected: 2.17.7.3550

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.17.7.3550

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.17.7.3550 (Debian / Ubuntu)

apt-cache madison webmail sudo apt install webmail=<VERSION_BEFORE_2.17.7.3550> sudo apt-mark hold webmail

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

dnf --showduplicates list webmail sudo dnf downgrade webmail-<VERSION_BEFORE_2.17.7.3550> sudo dnf versionlock add webmail

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-2019-9558?

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

Is CVE-2019-9558 being exploited?

CVE-2019-9558 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-2019-9558 affect?

CVE-2019-9558 affects webmail. Severity is medium (CVSS 6.1). Mailtraq WebMail version 2.17.7.3550 has Persistent Cross Site Scripting (XSS) via the body of an e-mail message. To exploit the vulnerability, the victim must open an email with malicious Javascript inserted into the body of the email as a

How urgent is CVE-2019-9558?

Priority 42/100. Public exploit reference

Related CVEs

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CVE-2026-114717 MEDIUM 4.0 UPGRADE Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability wh
CVE-2026-114718 MEDIUM 4.7 UPGRADE Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a cross-site scripting vulnerability in
CVE-2026-114720 HIGH 7.1 UPGRADE Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an IMAP command injection vulnerability

References

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