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Fencer Vulns
high 8.3

CVE-2023-40000 in the critical feed json

WordPress LiteSpeed Cache plugin <= 5.7 - Unauthenticated Site Wide Stored XSS vulnerability

published 2024-04-16 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-44623

cvss
8.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
54.9%
EPSS 54.9% chance of exploitation in 30 days, percentile 99%
public exploits
0
none known, plus a Nuclei check

Summary

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.

Patch / fix

  • LiteSpeed Technologies LiteSpeed Cache 5.7.0.1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

54.87% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template LiteSpeed Cache <= 5.7 - Unauthenticated Stored XSS nuclei detection template
  • github.com https://github.com/rxerium/CVE-2023-40000 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • LiteSpeed Technologies LiteSpeed Cache
  • litespeed_technologies litespeed_cache

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.