CVE-2026-75872

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (53rd percentile of EPSS-scored CVEs). 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, secondary
Trending — 3 sources updated this week
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 6.9Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

HTML Injection in the public subscription form in maalfer MailerUp before 1.1.3 allows unauthenticated remote attackers to have the application send a message carrying arbitrary HTML, to an attacker-chosen address and from the form owner's configured sending identity, via the first_name field of the subscription request, which is interpolated unescaped into the double opt-in verification email.

CVSS v3
6.9
EG Score
6.9MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100CISA 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
Severity69% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.7%
EPSS %ILE
53rd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

August 18, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic🟡 PoC Available

CVE-2026-75872 · HTML Injection in MailerUp allows attacker-controlled HTML to be delivered in double opt-in verification emails | Vulnerabilities published by Secur0

https://secur0.com/en/cna/cve-list/cve-2026-75872-html-injection-in-mailerup-double-optin-verification-email
github_commit

commit da4aedc96219 (maalfer/mailerup)

Fix landed in maalfer/mailerup commit da4aedc96219 — awaiting tagged release

https://github.com/maalfer/mailerup/commit/da4aedc9621911df4ce0cc8f0b321dd6d10f40a5

Vendor Advisories for CVE-2026-75872(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 16× in last 7d / 75× 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 131 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-75872?
CVE-2026-75872 is a medium vulnerability published on August 18, 2026. HTML Injection in the public subscription form in maalfer MailerUp before 1.1.3 allows unauthenticated remote attackers to have the application send a message carrying arbitrary HTML, to an attacker-chosen address and from the form owner's configured sending identity, via the first_name field of…
When was CVE-2026-75872 disclosed?
CVE-2026-75872 was first published on August 18, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75872 actively exploited?
CVE-2026-75872 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75872?
CVE-2026-75872 has a CVSS base score of 6.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75872?
An upstream fix for CVE-2026-75872 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-75872 are linked in the Vendor Advisories panel on this page.

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