CVE-2023-26290: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoi

Q: How do I fix CVE-2023-26290?

cloud security gateway: upgrade to 2023-03-29; web security: upgrade to 2023-03-29. Exact commands for each OS are on this page.

Q: Is CVE-2023-26290 being exploited?

CVE-2023-26290 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-2023-26290 affect?

CVE-2023-26290 affects cloud security gateway, web security. Severity is medium (CVSS 6.1). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoint Cloud Security Gateway (CSG) Portal on Web Cloud Security Gateway, Email Security Cloud (login_reset_request.mhtml modules), Fo

Q: How urgent is CVE-2023-26290?

Priority 29/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADEUPGRADE

CVE-2023-26290 is a medium-severity flaw (CVSS 6.1) affecting cloud security gateway, web 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 Cloud Security Gateway (CSG) Portal on Web Cloud Security Gateway, Email Security Cloud (login_reset_request.mhtml modules), Forcepoint Web Security Portal on Hybrid (login_reset_request.mhtml modules) allows Reflected XSS.This issue affects Cloud Security Gateway (CSG): before 03/29/2023; Web Security: before 03/29/2023.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-03-29
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

2023-03-29 17:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

forcepoint cloud security gateway UPGRADE

Affected: < 2023-03-29

Fixed in: 2023-03-29

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cloud-security-gateway || rpm -q cloud-security-gateway || cloud-security-gateway --version

2. UPGRADE to 2023-03-29 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cloud-security-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cloud-security-gateway

Note

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

forcepoint web security UPGRADE

Affected: < 2023-03-29

Fixed in: 2023-03-29

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2023-03-29 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade web-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-2023-26290?

cloud security gateway: upgrade to 2023-03-29; web security: upgrade to 2023-03-29. Exact commands for each OS are on this page.

Is CVE-2023-26290 being exploited?

CVE-2023-26290 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-2023-26290 affect?

CVE-2023-26290 affects cloud security gateway, web security. Severity is medium (CVSS 6.1). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoint Cloud Security Gateway (CSG) Portal on Web Cloud Security Gateway, Email Security Cloud (login_reset_request.mhtml modules), Fo

How urgent is CVE-2023-26290?

Priority 29/100. No elevated risk signals yet.

Related CVEs

CVE-2023-26292 MEDIUM 6.1 UPGRADE UPGRADE Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoi
CVE-2023-26291 MEDIUM 6.1 UPGRADE UPGRADE Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Forcepoi
CVE-2022-1700 HIGH 7.5 UPGRADE UPGRADE Improper Restriction of XML External Entity Reference ('XXE') vulnerability in the Policy Engine of Forcepoint

References

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