CVE-2023-45660

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 55% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: None knownExposed: 0

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

Nextcloud mail is an email app for the Nextcloud home server platform. In affected versions a missing check of origin, target and cookies allows for an attacker to abuse the proxy endpoint to denial of service a third server. It is recommended that the Nextcloud Mail is upgraded to 2.2.8 or 3.3.0. There are no known workarounds for this vulnerability.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity43% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

October 16, 2023

Last Modified

June 17, 2026

References (6)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 35× 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 166 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2023-45660?
CVE-2023-45660 is a medium vulnerability published on October 16, 2023. Nextcloud mail is an email app for the Nextcloud home server platform. In affected versions a missing check of origin, target and cookies allows for an attacker to abuse the proxy endpoint to denial of service a third server. It is recommended that the Nextcloud Mail is upgraded to 2.2.8 or 3.3.0.…
When was CVE-2023-45660 disclosed?
CVE-2023-45660 was first published in the National Vulnerability Database on October 16, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-45660 actively exploited?
CVE-2023-45660 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.4% of all scored CVEs.
What is the CVSS score of CVE-2023-45660?
CVE-2023-45660 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2023-45660?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-45660, 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.

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