CVE-2005-4080

What it is

Horde IMP 4.0.4 and earlier does not sanitize strings containing UTF16 null characters, which allows remote attackers to conduct cross-site scripting (XSS) attacks via UTF16 encoded attachments and strings that will be executed when viewed using Internet Explorer, which ignores the characters.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

2.4% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2005-12-08 01:03 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 22:18 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.4% in the next 30 days (EPSS).
• Severity: 4.3 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2005-12-08 01:03 UTC

Last modified

2026-06-16 22:18 UTC

Exploit probability

2.4% · EPSS, next 30 days

Record status

Modified

Affected

• Horde Imp 2.0
• Horde Imp 2.2
• Horde Imp 2.2.1
• Horde Imp 2.2.2
• Horde Imp 2.2.3
• Horde Imp 2.2.4
• Horde Imp 2.2.5
• Horde Imp 2.2.6

Attack profile CVSS 2.0 · 4.3

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2005-4080.md and follow it. Check whether this project is affected by CVE-2005-4080. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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