CVE-2018-25269: ICEWARP 10.3.4 and 11.0.0.0 contains a cross-site scripting vulnerability that allows attackers to inject mali

Routine

MEDIUM 6.1DOWNGRADE

CVE-2018-25269 is a medium-severity flaw (CVSS 6.1) affecting icewarp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ICEWARP 10.3.4 and 11.0.0.0 contains a cross-site scripting vulnerability that allows attackers to inject malicious HTML elements into emails by embedding base64-encoded payloads in object and embed tags. Attackers can craft emails containing data URIs with embedded scripts that execute in the client when the email is viewed, compromising user sessions and stealing sensitive information.

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	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-22
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: icewarp

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

Am I affected?

Timeline

2026-04-22 16:16 UTCPublished CVE record published
2026-06-17 01:55 UTCUpdated Record last modified

icewarp icewarp DOWNGRADE

Affected: 11.0.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 11.0.0.0 (Debian / Ubuntu)

apt-cache madison icewarp sudo apt install icewarp=<VERSION_BEFORE_11.0.0.0> sudo apt-mark hold icewarp

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

dnf --showduplicates list icewarp sudo dnf downgrade icewarp-<VERSION_BEFORE_11.0.0.0> sudo dnf versionlock add icewarp

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-2018-25269?

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

Is CVE-2018-25269 being exploited?

CVE-2018-25269 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-2018-25269 affect?

CVE-2018-25269 affects icewarp. Severity is medium (CVSS 6.1). ICEWARP 10.3.4 and 11.0.0.0 contains a cross-site scripting vulnerability that allows attackers to inject malicious HTML elements into emails by embedding base64-encoded payloads in object and embed tags. Attackers can craft emails containi

How urgent is CVE-2018-25269?

Priority 30/100. Public exploit reference

References

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