CVE-2026-78139

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-08-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

The Notifima WordPress plugin before 3.1.4 does not verify that the caller owns the subscription being modified on one of its REST endpoints in all versions up to, and including, 3.1.3, allowing authenticated attackers with Subscriber-level access to unsubscribe arbitrary customers from product stock-alert notifications.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 27, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Notifima < 3.1.4 – Subscriber+ Stock Alert Unsubscription via IDOR | CVE 2026-78139 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/b1a0e23b-35f7-4282-83f6-1917c89f7b4c/

Vendor Advisories for CVE-2026-78139(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 74× 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.

  1. 2026-09-20 23:28 UTCEG score recompute
  2. 2026-09-20 23:28 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-19 23:39 UTCGHSA enrichment
  5. 2026-09-18 23:51 UTCEG score recompute
  6. 2026-09-18 23:51 UTCGHSA enrichment
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-18 00:03 UTCEG score recompute
  9. 2026-09-18 00:03 UTCGHSA enrichment
  10. 2026-09-16 23:20 UTCEG score recompute
  11. 2026-09-16 23:20 UTCGHSA enrichment
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 23:31 UTCEG score recompute
  15. 2026-09-15 23:31 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 23:39 UTCGHSA enrichment
  19. 2026-09-13 23:49 UTCEG score recompute
  20. 2026-09-13 23:49 UTCGHSA enrichment
  21. 2026-09-13 00:01 UTCEG score recompute
  22. 2026-09-13 00:01 UTCGHSA enrichment
  23. 2026-09-12 00:12 UTCEG score recompute
  24. 2026-09-12 00:12 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 49 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 00:21 UTCEG score recompute
  3. 2026-09-11 00:21 UTCGHSA enrichment
  4. 2026-09-10 09:35 UTCEPSS rescore
  5. 2026-09-10 00:33 UTCGHSA enrichment
  6. 2026-09-09 00:44 UTCEG score recompute
  7. 2026-09-09 00:44 UTCGHSA enrichment
  8. 2026-09-08 22:01 UTCEPSS rescore
  9. 2026-09-07 20:00 UTCEG score recompute
  10. 2026-09-07 20:00 UTCGHSA enrichment
  11. 2026-09-06 20:12 UTCEG score recompute
  12. 2026-09-06 20:12 UTCGHSA enrichment
  13. 2026-09-06 13:48 UTCEPSS rescore
  14. 2026-09-05 20:23 UTCEG score recompute
  15. 2026-09-05 20:23 UTCGHSA enrichment
  16. 2026-09-04 20:35 UTCEG score recompute
  17. 2026-09-04 20:35 UTCGHSA enrichment
  18. 2026-09-04 05:07 UTCEPSS rescore
  19. 2026-09-03 20:24 UTCGHSA enrichment
  20. 2026-09-02 20:31 UTCEG score recompute
  21. 2026-09-02 20:31 UTCGHSA enrichment
  22. 2026-09-02 14:12 UTCEPSS rescore
  23. 2026-09-01 18:30 UTCEG score recompute
  24. 2026-09-01 18:29 UTCGHSA enrichment
  25. 2026-09-01 13:54 UTCEPSS rescore
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-09-01 04:40 UTCEPSS rescore
  28. 2026-08-31 18:39 UTCEG score recompute
  29. 2026-08-31 18:39 UTCGHSA enrichment
  30. 2026-08-30 19:18 UTCEPSS rescore
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 18:41 UTCEG score recompute
  33. 2026-08-30 18:41 UTCGHSA enrichment
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-29 18:52 UTCEG score recompute
  36. 2026-08-29 18:52 UTCGHSA enrichment
  37. 2026-08-28 21:42 UTCEPSS rescore
  38. 2026-08-28 19:04 UTCGHSA enrichment
  39. 2026-08-28 17:20 UTCEG score recompute
  40. 2026-08-28 17:20 UTCGHSA enrichment
  41. 2026-08-27 17:28 UTCGHSA enrichment
  42. 2026-08-27 16:50 UTCEG score recompute▲ 4.30
  43. 2026-08-27 16:50 UTCGHSA enrichment
  44. 2026-08-27 16:43 UTCMITRE cvelistV5CVSS v3 → 4.3 · severity → MEDIUM
  45. 2026-08-27 14:25 UTCEPSS rescore
  46. 2026-08-27 06:31 UTCGHSA enrichment
  47. 2026-08-27 06:17 UTCNVD update
  48. 2026-08-27 06:15 UTCEG score recompute
  49. 2026-08-27 06:11 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78139?
CVE-2026-78139 is a medium vulnerability published on August 27, 2026. The Notifima WordPress plugin before 3.1.4 does not verify that the caller owns the subscription being modified on one of its REST endpoints in all versions up to, and including, 3.1.3, allowing authenticated attackers with Subscriber-level access to unsubscribe arbitrary customers from product…
When was CVE-2026-78139 disclosed?
CVE-2026-78139 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78139 actively exploited?
CVE-2026-78139 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.3% of all scored CVEs.
What is the CVSS score of CVE-2026-78139?
CVE-2026-78139 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-78139?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78139, 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

Explore the affected products and dependency analysis for CVE-2026-78139

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