CVE-2024-2166: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoi

Q: How do I fix CVE-2024-2166?

email security: upgrade to 8.5.5. Exact commands for each OS are on this page.

Q: Is CVE-2024-2166 being exploited?

CVE-2024-2166 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-2024-2166 affect?

CVE-2024-2166 affects email security. Severity is high (CVSS 8.8). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoint Email Security (Real Time Monitor modules) allows Reflected XSS.This issue affects Email Security: before 8.5.5 HF003.

Routine

HIGH 8.8UPGRADE

CVE-2024-2166 is a high-severity flaw (CVSS 8.8) affecting email security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoint Email Security (Real Time Monitor modules) allows Reflected XSS.This issue affects Email Security: before 8.5.5 HF003.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-09-04
Last modified	2026-06-17

Publisher (CNA): Forcepoint · Vendor: forcepoint

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

Am I affected?

Timeline

2024-09-04 22:15 UTCPublished CVE record published
2026-06-17 07:23 UTCUpdated Record last modified

forcepoint email security UPGRADE

Affected: < 8.5.5 · 8.5.5

Fixed in: 8.5.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy email-security || rpm -q email-security || email-security --version

2. UPGRADE to 8.5.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade email-security

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade email-security

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2024-2166?

email security: upgrade to 8.5.5. Exact commands for each OS are on this page.

Is CVE-2024-2166 being exploited?

CVE-2024-2166 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-2024-2166 affect?

CVE-2024-2166 affects email security. Severity is high (CVSS 8.8). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoint Email Security (Real Time Monitor modules) allows Reflected XSS.This issue affects Email Security: before 8.5.5 HF003.

How urgent is CVE-2024-2166?

Priority 37/100. High severity

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References

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