CVE-2023-40000

HIGHNVD 8.38.6▲
EchelonGraph scoreHIGH confidence

Score elevated to 8.6 because EPSS predicts 55% probability of exploitation within the next 30 days (top 1.1% of all CVEs). NVD baseline CVSS 8.3 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
8.6EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 55%
  • Public exploit code is available (ssvc poc, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 55%CVSS: 8.3Exploit: ssvc poc · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.3
EG Score
8.6(high)
EG Risk
65(Track)
EG Risk 65/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation65% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
55%
EPSS %ILE
99%
KEV
Not listed

Published

April 16, 2024

Last Modified

April 28, 2026

Advisory Details (2)

Auto-updated May 3, 2026
No patch confirmed yet.
generic

GitHub - rxerium/CVE-2023-40000: LiteSpeed Cache plugin for WordPress that could enable unauthenticated users to escalate their privileges · GitHub

https://github.com/rxerium/CVE-2023-40000
generic

Cross Site Scripting (XSS) in WordPress LiteSpeed Cache Plugin - Patchstack

https://patchstack.com/database/vulnerability/litespeed-cache/wordpress-litespeed-cache-plugin-5-7-unauthenticated-site-wide-stored-xss-vulnerability?_s_id=cve

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 3× in last 7d / 34× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-08-07 16:25 UTCEPSS rescore
  2. 2026-08-06 13:45 UTCEPSS rescore
  3. 2026-08-04 15:07 UTCEPSS rescore
  4. 2026-08-01 04:14 UTCEPSS rescore
  5. 2026-08-01 04:13 UTCEPSS rescore
  6. 2026-07-30 16:26 UTCEPSS rescore
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  8. 2026-07-30 01:28 UTCEPSS rescore
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  10. 2026-07-28 15:34 UTCEPSS rescore
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  12. 2026-07-26 14:52 UTCEPSS rescore
  13. 2026-07-26 14:52 UTCEPSS rescore
  14. 2026-07-24 14:16 UTCEPSS rescore
  15. 2026-07-23 02:25 UTCEG score recompute▲ 0.30
  16. 2026-07-22 23:12 UTCEG score recompute
  17. 2026-07-22 14:06 UTCEPSS rescore
  18. 2026-07-20 17:06 UTCEPSS rescore
  19. 2026-07-19 14:29 UTCEPSS rescore
  20. 2026-07-19 02:27 UTCEPSS rescore
  21. 2026-07-16 17:01 UTCEPSS rescore
  22. 2026-07-16 17:01 UTCEPSS rescore
  23. 2026-07-15 16:56 UTCEPSS rescore
  24. 2026-07-15 16:56 UTCEPSS rescore
  25. 2026-07-15 01:58 UTCEPSS rescore
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  1. 2026-07-13 22:28 UTCEPSS rescore
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  3. 2026-07-13 06:11 UTCEPSS rescore
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  5. 2026-07-12 05:45 UTCEPSS rescore
  6. 2026-07-12 05:45 UTCEPSS rescore
  7. 2026-07-11 08:26 UTCEPSS rescore
  8. 2026-07-11 08:26 UTCEPSS rescore
  9. 2026-07-09 19:08 UTCEPSS rescore
  10. 2026-07-08 15:13 UTCEPSS rescore
  11. 2026-07-05 02:29 UTCEPSS rescore
  12. 2026-07-01 15:05 UTCEPSS rescore
  13. 2026-06-30 23:21 UTCEPSS rescore
  14. 2026-06-30 23:21 UTCEPSS rescore
  15. 2026-06-28 04:55 UTCEPSS rescore
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  17. 2026-06-27 03:07 UTCEPSS rescore
  18. 2026-06-27 03:07 UTCEPSS rescore
  19. 2026-06-25 13:48 UTCEPSS rescore
  20. 2026-06-25 13:48 UTCEPSS rescore
  21. 2026-06-24 14:04 UTCEPSS rescore
  22. 2026-06-24 14:04 UTCEPSS rescore
  23. 2026-06-23 21:31 UTCEPSS rescore
  24. 2026-06-23 21:31 UTCEPSS rescore
  25. 2026-06-21 01:58 UTCEPSS rescore
  26. 2026-06-21 01:58 UTCEPSS rescore
  27. 2026-06-18 17:51 UTCEPSS rescore
  28. 2026-06-17 17:51 UTCEPSS rescore
  29. 2026-06-17 17:51 UTCEPSS rescore
  30. 2026-06-16 17:51 UTCEPSS rescore
  31. 2026-06-16 17:51 UTCEPSS rescore
  32. 2026-06-15 17:47 UTCEPSS rescore
  33. 2026-06-15 17:47 UTCEPSS rescore
  34. 2026-06-12 23:10 UTCEPSS rescore
  35. 2026-06-12 23:10 UTCEPSS rescore
  36. 2026-06-10 22:17 UTCEPSS rescore
  37. 2026-06-10 13:21 UTCEPSS rescore
  38. 2026-06-10 13:21 UTCEPSS rescore
  39. 2026-06-08 14:16 UTCEPSS rescore
  40. 2026-06-08 14:16 UTCEPSS rescore
  41. 2026-06-07 15:23 UTCEPSS rescore
  42. 2026-06-07 15:23 UTCEPSS rescore
  43. 2026-06-06 13:46 UTCEPSS rescore
  44. 2026-06-06 13:46 UTCEPSS rescore
  45. 2026-06-05 22:46 UTCEPSS rescore
  46. 2026-06-05 22:46 UTCEPSS rescore
  47. 2026-06-05 06:09 UTCEPSS rescore
  48. 2026-06-05 06:09 UTCEPSS rescore
  49. 2026-06-05 06:09 UTCEPSS rescore
  50. 2026-06-04 13:11 UTCEPSS rescore
  51. 2026-06-04 13:11 UTCEPSS rescore
  52. 2026-06-02 20:12 UTCEPSS rescore
  53. 2026-06-02 20:12 UTCEPSS rescore
  54. 2026-06-01 13:51 UTCEPSS rescore
  55. 2026-06-01 13:51 UTCEPSS rescore
  56. 2026-05-31 00:15 UTCEPSS rescore
  57. 2026-05-31 00:15 UTCEPSS rescore
  58. 2026-05-29 13:43 UTCEPSS rescore
  59. 2026-05-29 13:43 UTCEPSS rescore
  60. 2026-05-28 13:44 UTCEPSS rescore
  61. 2026-05-28 13:43 UTCEPSS rescore
  62. 2026-05-27 13:39 UTCEPSS rescore
  63. 2026-05-27 13:39 UTCEPSS rescore
  64. 2026-05-22 21:16 UTCEPSS rescore
  65. 2026-05-22 21:16 UTCEPSS rescore
  66. 2026-05-22 21:16 UTCEPSS rescore
  67. 2026-05-22 21:16 UTCEPSS rescore
  68. 2026-05-22 21:16 UTCEPSS rescore
  69. 2026-05-22 21:16 UTCEPSS rescore
  70. 2026-05-22 03:05 UTCEG score recompute
  71. 2026-05-22 03:05 UTCGHSA enrichment
  72. 2026-05-20 22:37 UTCEPSS rescore
  73. 2026-05-20 22:37 UTCEPSS rescore
  74. 2026-05-20 22:37 UTCEPSS rescore
  75. 2026-05-20 22:37 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCquantiom/litespeed-cache-xss-poc
    First seen May 12, 2024

    PoC for XSS vulnerability in the LiteSpeed Cache WordPress plugin (CVE-2023-40000) allowing elevated privileges. Includes code, explanations, and mitigations.

    Open source ↗
  • GitHub PoCrxerium/CVE-2023-40000
    First seen Feb 28, 2024

    LiteSpeed Cache plugin for WordPress that could enable unauthenticated users to escalate their privileges

    Open source ↗
  • Nucleihttp/cves/2023/CVE-2023-40000.yaml
    First seen Jan 1, 2023

    LiteSpeed Cache <= 5.7 - Unauthenticated Stored XSS

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-40000?
CVE-2023-40000 is a high vulnerability published on April 16, 2024. 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.
When was CVE-2023-40000 disclosed?
CVE-2023-40000 was first published in the National Vulnerability Database on April 16, 2024, with the most recent update on April 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-40000 actively exploited?
CVE-2023-40000 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 55% probability of exploitation in the next 30 days, which ranks it in the top 1.1% of all scored CVEs.
What is the CVSS score of CVE-2023-40000?
CVE-2023-40000 has a CVSS v3 base score of 8.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.6.
How do I remediate CVE-2023-40000?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40000, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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