CVE-2023-6875

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2024-01-11. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this weekWeaponized

Also known asEUVD-2023-59079 (ENISA EUVD) · GHSA-9cw8-p5p2-35pf (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High exploitation likelihood — EPSS 90%
  • Public exploit code is available (Metasploit, other public proof-of-concept code)
CISA-KEV: Not listedEPSS PROB: 90%CVSS: 9.8Exploit: Metasploit · other public PoCExposed services: Not assessed

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

The CVE record's CNA (Wordfence) lists saadiqbal Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App versions up to and including 2.8.7 as affected. No release containing a fix is confirmed on record.

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to unauthorized access of data and modification of data due to a type juggling issue on the connect-app REST endpoint in all versions up to, and including, 2.8.7. This makes it possible for unauthenticated attackers to reset the API key used to authenticate to the mailer and view logs, including password reset emails, allowing site takeover. CVE-2023-52233 appears to be a duplicate of this issue.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
95
EG Risk 95/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation90% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
90%
EPSS %ILE
99th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
90% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

January 11, 2024

Last Modified

April 8, 2026

Advisory Details (1)

Auto-updated Oct 9, 2026
No fix on record yet.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 55× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 92 of 130 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 8 repeat rows among the latest 100 are merged into the row they repeat. The 38 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 05:20 UTCEG score recompute
  2. 2026-11-02 05:20 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-01 05:22 UTCEG score recompute
  4. 2026-11-01 05:22 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-31 05:24 UTCEG score recompute
  6. 2026-10-31 05:24 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-30 16:31 UTCEPSS rescoreEPSS 90% · 99th percentile
  8. 2026-10-30 05:25 UTCEG score recompute
  9. 2026-10-30 05:25 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-29 05:26 UTCEG score recompute
  11. 2026-10-29 05:26 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-28 05:27 UTCEG score recompute
  13. 2026-10-28 05:27 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-27 16:29 UTCEPSS rescoreEPSS 90% · 99th percentile
  15. 2026-10-27 05:29 UTCEG score recompute
  16. 2026-10-27 05:29 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-26 01:26 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-25 17:25 UTCEG score recompute
  19. 2026-10-25 16:30 UTCEPSS rescoreEPSS 90% · 99th percentile
  20. 2026-10-25 01:27 UTCEG score recompute
  21. 2026-10-25 01:27 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-24 01:29 UTCEG score recompute
  23. 2026-10-24 01:29 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-23 16:29 UTCEPSS rescoreEPSS 90% · 99th percentile
  25. 2026-10-23 01:30 UTCEG score recompute
Show 67 more
  1. 2026-10-23 01:30 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-10-22 01:31 UTCEG score recompute
  3. 2026-10-22 01:31 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-21 16:29 UTCEPSS rescoreEPSS 90% · 99th percentile
  5. 2026-10-21 01:33 UTCEG score recompute
  6. 2026-10-21 01:33 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-20 01:34 UTCEG score recompute
  8. 2026-10-20 01:34 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-19 00:29 UTCEG score recompute
  10. 2026-10-19 00:29 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-10-18 07:38 UTCEG score recompute
  12. 2026-10-18 00:30 UTCEG score recompute
  13. 2026-10-18 00:30 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-17 00:29 UTCEG score recompute
  15. 2026-10-17 00:29 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-16 00:01 UTCEG score recompute
  17. 2026-10-16 00:01 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-14 16:30 UTCEPSS rescoreEPSS 90% · 99th percentile
  19. 2026-10-14 16:02 UTCEG score recompute
  20. 2026-10-14 16:02 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-13 16:30 UTCEPSS rescoreEPSS 90% · 99th percentile
  22. 2026-10-13 15:11 UTCEG score recompute
  23. 2026-10-13 15:11 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-12 16:31 UTCEPSS rescoreEPSS 90% · 99th percentile
  25. 2026-10-12 15:13 UTCEG score recompute
  26. 2026-10-12 15:12 UTCGHSA enrichmentGHSA-9cw8-p5p2-35pf · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-11 21:35 UTCEG score recompute
  28. 2026-10-10 19:58 UTCEPSS rescoreEPSS 90% · 99th percentile
  29. 2026-10-07 23:46 UTCEPSS rescoreEPSS 90% · 99th percentile
  30. 2026-10-07 17:24 UTCOSV refresh
  31. 2026-10-01 19:48 UTCEPSS rescoreEPSS 90% · 99th percentile
  32. 2026-09-30 16:39 UTCEG score recompute
  33. 2026-09-24 14:01 UTCEPSS rescoreEPSS 90% · 99th percentile
  34. 2026-09-23 13:46 UTCEPSS rescoreEPSS 90% · 99th percentile
  35. 2026-09-18 19:26 UTCEPSS rescoreEPSS 90% · 99th percentile
  36. 2026-09-17 23:20 UTCOSV refresh
  37. 2026-09-16 05:11 UTCEPSS rescoreEPSS 90% · 99th percentile
  38. 2026-09-11 09:34 UTCEPSS rescoreEPSS 90% · 99th percentile
  39. 2026-09-08 21:58 UTCEPSS rescoreEPSS 90% · 99th percentile
  40. 2026-09-06 13:46 UTCEPSS rescoreEPSS 90% · 99th percentile
  41. 2026-09-05 15:26 UTCEPSS rescoreEPSS 90% · 99th percentile
  42. 2026-08-30 19:15 UTCEPSS rescoreEPSS 90% · 99th percentile
  43. 2026-08-29 23:43 UTCOSV refresh
  44. 2026-08-28 21:39 UTCEPSS rescoreEPSS 90% · 99th percentile
  45. 2026-08-19 17:02 UTCEPSS rescoreEPSS 90% · 99th percentile
  46. 2026-08-18 13:46 UTCEPSS rescoreEPSS 90% · 99th percentile
  47. 2026-08-16 02:12 UTCEPSS rescoreEPSS 90% · 99th percentile
  48. 2026-08-13 10:07 UTCOSV refresh
  49. 2026-08-11 13:40 UTCEPSS rescoreEPSS 90% · 99th percentile
  50. 2026-08-08 16:35 UTCEPSS rescoreEPSS 90% · 99th percentile
  51. 2026-08-01 04:14 UTCEPSS rescoreEPSS 90% · 99th percentile
  52. 2026-07-30 16:26 UTCEPSS rescoreEPSS 90% · 99th percentile
  53. 2026-07-28 18:21 UTCOSV refresh
  54. 2026-07-28 15:34 UTCEPSS rescoreEPSS 90% · 99th percentile
  55. 2026-07-24 14:16 UTCEPSS rescoreEPSS 90% · 99th percentile
  56. 2026-07-23 02:30 UTCEG score recompute
  57. 2026-07-22 23:17 UTCEG score recompute
  58. 2026-07-22 14:07 UTCEPSS rescoreEPSS 90% · 99th percentile
  59. 2026-07-15 16:56 UTCEPSS rescoreEPSS 90% · 99th percentile
  60. 2026-07-11 10:41 UTCOSV refresh
  61. 2026-07-08 15:13 UTCEPSS rescoreEPSS 90% · 99th percentile
  62. 2026-07-06 16:26 UTCEPSS rescoreEPSS 90% · 99th percentile
  63. 2026-07-05 02:29 UTCEPSS rescoreEPSS 90% · 99th percentile
  64. 2026-06-30 23:21 UTCEPSS rescoreEPSS 90% · 99th percentile
  65. 2026-06-29 14:05 UTCEPSS rescoreEPSS 90% · 99th percentile
  66. 2026-06-28 04:55 UTCEPSS rescoreEPSS 90% · 99th percentile
  67. 2026-06-24 14:04 UTCEPSS rescoreEPSS 90% · 99th percentile

Publicly available exploits

(4 references)

Public exploit code is referenced for this CVE (1 Metasploit module, 2 GitHub PoCs), as is 1 Nuclei detection template. A detection template checks whether a system is affected; it is not necessarily exploit code. No fix is confirmed yet, so defenders should restrict or isolate affected systems accordingly until one is published.

  • Metasploitauxiliary/admin/http/wp_post_smtp_acct_takeover✓ verified
    Published Nov 29, 2024

    Wordpress POST SMTP Account Takeover

    Open source ↗
  • GitHub PoCgbrsh/CVE-2023-6875
    Published Jan 27, 2024

    Exploit for CVE-2023-6875 - Unauthorized Account Takeover.

    Open source ↗
  • Nucleihttp/cves/2023/CVE-2023-6875.yaml
    Published Jan 17, 2024

    WordPress POST SMTP Mailer <= 2.8.7 - Authorization Bypass

    Open source ↗
  • GitHub PoCUlyssesSaicha/CVE-2023-6875
    Published Jan 13, 2024

    CVE-2023-6875 PoC

    Open source ↗

Frequently asked(5)

What is CVE-2023-6875?
CVE-2023-6875 is a critical-severity vulnerability; its CVE record was published on January 11, 2024. The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to unauthorized access of data and modification of data due to a type juggling issue on the connect-app REST endpoint in all versions up to, and including, 2.8.7.…
When was the CVE record for CVE-2023-6875 published?
The CVE record for CVE-2023-6875 was published on January 11, 2024. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of April 8, 2026; the record at its source may have been updated since.
Is CVE-2023-6875 actively exploited?
CVE-2023-6875 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model places it in Tier 2 (Weaponized), which is not evidence of exploitation: a Metasploit module exists for it. EchelonGraph does not test whether exploit code works. FIRST EPSS estimates a 90% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-6875?
CVE-2023-6875 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-6875?
No fix for CVE-2023-6875 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix. The CVE record's CNA (Wordfence) lists saadiqbal Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App versions up to and including 2.8.7 as affected. No release containing a fix is confirmed on record.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-6875

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