How severe is CVE-2023-26291?

CVE-2023-26291 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-26291 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-26291?

CVE-2023-26291 primarily affects Forcepoint Cloud Security Gateway. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-26291?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-26291 published?

CVE-2023-26291 was published on 2023-03-29 and last updated on 2026-06-17.

CVE-2023-26291

CVE-2023-26291 is a medium-severity vulnerability in Forcepoint Cloud Security Gateway with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Forcepoint Cloud Security Gateway
Published: 2023-03-29
Last modified: 2026-06-17

Description

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_form.mhtml modules), Forcepoint Web Security Portal on Hybrid (login_form.mhtml modules) allows Reflected XSS.This issue affects Cloud Security Gateway (CSG): before 03/29/2023; Web Security: before 03/29/2023.

Frequently asked questions

What is CVE-2023-26291?: 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_form.mhtml modules), Forcepoint Web Security Portal on Hybrid (login_form.mhtml modules) allows Reflected XSS.This issue affects Cloud Security Gateway (CSG): before 03/29/2023; Web Security: before 03/29/2023.
How severe is CVE-2023-26291?: CVE-2023-26291 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-26291 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-26291?: CVE-2023-26291 primarily affects Forcepoint Cloud Security Gateway. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-26291?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-26291 published?: CVE-2023-26291 was published on 2023-03-29 and last updated on 2026-06-17.

References

https://support.forcepoint.com/s/article/000041617

Affected products (2)

cpe:2.3:a:forcepoint:cloud_security_gateway:*:*:*:*:*:*:*:*
cpe:2.3:a:forcepoint:web_security:*:*:*:*:*:*:*:*

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