How severe is CVE-2023-40000?

CVE-2023-40000 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-40000 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 55% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40000?

CVE-2023-40000 affects Litespeedtech Litespeed Cache. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40000?

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.

Does CVE-2023-40000 have an EU (EUVD) identifier?

Yes. CVE-2023-40000 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44623.

When was CVE-2023-40000 published?

CVE-2023-40000 was published on 2024-04-16 and last updated on 2026-06-17.

CVE-2023-40000

CVE-2023-40000 is a high-severity vulnerability in Litespeedtech Litespeed Cache with a CVSS 3.x base score of 8.3. Its EPSS exploit-prediction score of 55% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.3)
EPSS exploit prediction: 55% (99th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-44623
Weakness: CWE-79
Affected product: Litespeedtech Litespeed Cache
Published: 2024-04-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-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.
How severe is CVE-2023-40000?: CVE-2023-40000 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-40000 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 55% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40000?: CVE-2023-40000 affects Litespeedtech Litespeed Cache. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40000?: 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.
Does CVE-2023-40000 have an EU (EUVD) identifier?: Yes. CVE-2023-40000 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44623.
When was CVE-2023-40000 published?: CVE-2023-40000 was published on 2024-04-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:litespeedtech:litespeed_cache:*:*:*:*:*:wordpress:*:*

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