ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2021-31589

BeyondTrust appliance_base_software Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Published Aug 19, 2022 · catalog updated Aug 19, 2022 · BeyondTrust

Patch now

CVE-2021-31589 is in the CISA known-exploited catalog. Confirm BeyondTrust against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
25.99%
Remediation
Remediation guidance
Affected products
vendor BeyondTrust appliance_base_software

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor BeyondTrust appliance_base_softwareversion unspecified

How to fix CVE-2021-31589

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-31589 is in the CISA known-exploited catalog. Confirm BeyondTrust against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 25.99%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 19, 2022 · VulnCheck KEV

    Detected

    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.

  2. Aug 19, 2022 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2021-31589

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-31589

    30-day exploitation probability 26.0%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2021-31589

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.