CVE-2021-31589

Appliance Base Software vulnerability

CVSS

6.1

EPSS

28.2%

EPSS pct

98th

Exploited

No known

A cross-site scripting (XSS) vulnerability has been reported and confirmed for BeyondTrust Secure Remote Access Base Software version 6.0.1 and older, which allows the injection of unauthenticated, specially-crafted web requests without proper sanitization.

Affected vendor

Beyondtrust

Affected product

Appliance Base Software

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness type (CWE)

CWE-79 — Cross-Site Scripting (XSS)

Published

2022-01-05

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity.

Its EPSS score of 28.2% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2021-31589

Confirm whether Beyondtrust Appliance Base Software is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-31589.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-31589

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-31589 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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