CVE-2023-20108

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2023-06-28. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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

A vulnerability in the XCP Authentication Service of the Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) could allow an unauthenticated, remote attacker to cause a temporary service outage for all Cisco Unified CM IM&P users who are attempting to authenticate to the service, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted login message to the affected device. A successful exploit could allow the attacker to cause an unexpected restart of the authentication service, preventing new users from successfully authenticating. Exploitation of this vulnerability does not impact Cisco Unified CM IM&P users who were authenticated prior to an attack.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.9%
EPSS %ILE
59th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 28, 2023

Last Modified

November 21, 2024

References (2)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 27× 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 183 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2023-20108?
CVE-2023-20108 is a high vulnerability published on June 28, 2023. A vulnerability in the XCP Authentication Service of the Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) could allow an unauthenticated, remote attacker to cause a temporary service outage for all Cisco Unified CM IM&P users who are attempting to…
When was CVE-2023-20108 disclosed?
CVE-2023-20108 was first published on June 28, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-20108 actively exploited?
CVE-2023-20108 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (59th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-20108?
CVE-2023-20108 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2023-20108?
No fix for CVE-2023-20108 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

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