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Vulnerabilities

Vulnerability · CVE-2023-40000

LiteSpeed Cache Web Page Generation Cross Site Scripting

Published May 3, 2024 · catalog updated May 3, 2024 · LiteSpeed Technologies LiteSpeed Cache

Patch now

CVE-2023-40000 is in the CISA known-exploited catalog. Confirm LiteSpeed Technologies LiteSpeed Cache 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
54.87%
Remediation
Remediation guidance
Affected products
vendor LiteSpeed Technologies LiteSpeed Cache

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LiteSpeed Technologies LiteSpeed Cache allows Stored XSS.This issue affects LiteSpeed Cache: from n/a through 5.7.

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 LiteSpeed Technologies LiteSpeed Cacheversion unspecified

How to fix CVE-2023-40000

What to do

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

Should you patch?

CVE-2023-40000 is in the CISA known-exploited catalog. Confirm LiteSpeed Technologies LiteSpeed Cache 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 54.87%. 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. May 3, 2024 · VulnCheck KEV

    Detected

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LiteSpeed Technologies LiteSpeed Cache allows Stored XSS.This issue affects LiteSpeed Cache: from n/a through 5.7.

  2. May 3, 2024 · 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-2023-40000

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-40000

    30-day exploitation probability 54.9%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2023-40000

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LiteSpeed Technologies LiteSpeed Cache allows Stored XSS.This issue affects LiteSpeed Cache: from n/a through 5.7.

    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.