Is CVE-2021-23271 actively exploited?

No active exploitation of CVE-2021-23271 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-23271 be exploited remotely?

Yes. CVE-2021-23271 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-23271?

CVE-2021-23271 has a CVSS score of 8.0 (HIGH).

HOME VULNERABILITIESCVE-2021-23271

HIGH

CVE-2021-23271

CWE-79Published: February 2, 2021· Updated: Jun 17, 2026

8.0

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-23271 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.0.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.