How severe is CVE-2021-35493?

CVE-2021-35493 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-35493 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35493?

CVE-2021-35493 primarily affects Tibco Webfocus Client. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-35493?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-35493 published?

CVE-2021-35493 was published on 2021-09-14 and last updated on 2026-06-17.

CVE-2021-35493

CVE-2021-35493 is a critical-severity vulnerability in Tibco Webfocus Client with a CVSS 3.x base score of 9.0. 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: Critical (CVSS 3.x base score 9.0)
CVSS v2: 3.5
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Tibco Webfocus Client
Published: 2021-09-14
Last modified: 2026-06-17

Description

The WebFOCUS Reporting Server and WebFOCUS Client components of TIBCO Software Inc.'s TIBCO WebFOCUS Client, TIBCO WebFOCUS Installer, and TIBCO WebFOCUS Reporting Server contain easily exploitable Stored and Reflected Cross Site Scripting (XSS) vulnerabilities that allow a low privileged attacker to social engineer a legitimate user with network access to execute scripts targeting the affected system or the victim's local system. A successful attack using this vulnerability requires human interaction from a person other than the attacker. Affected releases are TIBCO Software Inc.'s TIBCO WebFOCUS Client: versions 8207.27.0 and below, TIBCO WebFOCUS Installer: versions 8207.27.0 and below, and TIBCO WebFOCUS Reporting Server: versions 8207.27.0 and below.

Frequently asked questions

What is CVE-2021-35493?: The WebFOCUS Reporting Server and WebFOCUS Client components of TIBCO Software Inc.'s TIBCO WebFOCUS Client, TIBCO WebFOCUS Installer, and TIBCO WebFOCUS Reporting Server contain easily exploitable Stored and Reflected Cross Site Scripting (XSS) vulnerabilities that allow a low privileged attacker to social engineer a legitimate user with network access to execute scripts targeting the affected system or the victim's local system. A successful attack using this vulnerability requires human interaction from a person other than the attacker. Affected releases are TIBCO Software Inc.'s TIBCO WebFOCUS Client: versions 8207.27.0 and below, TIBCO WebFOCUS Installer: versions 8207.27.0 and below, and TIBCO WebFOCUS Reporting Server: versions 8207.27.0 and below.
How severe is CVE-2021-35493?: CVE-2021-35493 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-35493 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35493?: CVE-2021-35493 primarily affects Tibco Webfocus Client. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-35493?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-35493 published?: CVE-2021-35493 was published on 2021-09-14 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:tibco:webfocus_client:*:*:*:*:*:*:*:*
cpe:2.3:a:tibco:webfocus_installer:*:*:*:*:*:*:*:*
cpe:2.3:a:tibco:webfocus_reporting_server:*:*:*:*:*:*:*:*

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