How severe is CVE-2021-23271?

CVE-2021-23271 has a CVSS 3.x base score of 8.0, rated high 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-2021-23271 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23271?

CVE-2021-23271 affects Tibco Ebx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23271?

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

When was CVE-2021-23271 published?

CVE-2021-23271 was published on 2021-02-02 and last updated on 2026-06-17.

CVE-2021-23271

CVE-2021-23271 is a high-severity vulnerability in Tibco Ebx with a CVSS 3.x base score of 8.0. 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: High (CVSS 3.x base score 8.0)
CVSS v2: 6.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Tibco Ebx
Published: 2021-02-02
Last modified: 2026-06-17

Description

The TIBCO EBX Web Server component of TIBCO Software Inc.'s TIBCO EBX contains a vulnerability that theoretically allows a low privileged attacker with network access to execute a Stored Cross Site Scripting (XSS) attack on the affected system. Affected releases are TIBCO Software Inc.'s TIBCO EBX: versions 5.9.12 and below.

Frequently asked questions

What is CVE-2021-23271?: The TIBCO EBX Web Server component of TIBCO Software Inc.'s TIBCO EBX contains a vulnerability that theoretically allows a low privileged attacker with network access to execute a Stored Cross Site Scripting (XSS) attack on the affected system. Affected releases are TIBCO Software Inc.'s TIBCO EBX: versions 5.9.12 and below.
How severe is CVE-2021-23271?: CVE-2021-23271 has a CVSS 3.x base score of 8.0, rated high 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-2021-23271 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23271?: CVE-2021-23271 affects Tibco Ebx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23271?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-23271 published?: CVE-2021-23271 was published on 2021-02-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tibco:ebx:*:*:*:*:*:*:*:*

More vulnerabilities in Tibco Ebx

CVE-2021-35498 — Critical (CVSS 9.8): The TIBCO EBX Web Server component of TIBCO Software Inc.'s TIBCO EBX, TIBCO EBX, TIBCO EBX, and TIBCO Product and…
CVE-2019-17330 — Critical (CVSS 9.6): The Web server component of TIBCO Software Inc.'s TIBCO EBX contains multiple vulnerabilities that theoretically allow…
CVE-2023-26222 — High (CVSS 8.7): The Web Application component of TIBCO Software Inc.'s TIBCO EBX and TIBCO Product and Service Catalog powered by TIBCO…
CVE-2022-41565 — High (CVSS 8.7): The Web Application component of TIBCO Software Inc.'s TIBCO EBX and TIBCO Product and Service Catalog powered by TIBCO…
CVE-2022-30577 — High (CVSS 8.0): The Web Server component of TIBCO Software Inc.'s TIBCO EBX contains an easily exploitable vulnerability that allows a…
CVE-2022-22769 — High (CVSS 8.0): The Web server component of TIBCO Software Inc.'s TIBCO EBX, TIBCO EBX, TIBCO EBX, TIBCO EBX Add-ons, TIBCO EBX…

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