WordPress Newsletters, Email Marketing, SMS and Popups by Omnisend plugin <= 1.9.0 - Insecure Direct Object References (IDOR) vulnerability
Published Sep 30, 2026
4.3
MEDIUMCVSS 3.1
EPSS 0.25%
Description
Subscriber Insecure Direct Object References (IDOR) in Newsletters, Email Marketing, SMS and Popups by Omnisend <= 1.9.0 versions.
Affected products
-
- Version -StatusaffectedConstraints<=1.9.0
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Omnisend | Newsletters, Email Marketing, SMS and Popups by Omnisend | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Update the WordPress Newsletters, Email Marketing, SMS and Popups by Omnisend plugin to the latest available version (at least 1.9.1).
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 30, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.25% (0.00246) | 14.41th | v5 (v2026.06.15) |
| Oct 1, 2026 | 0.25% (0.00254) | 15.36th | v5 (v2026.06.15) |
References (1)
Change history (0)
No recorded changes yet.