CVE-2026-66703
WordPress MailOptin plugin <= 1.2.78.0 - Cross Site Scripting (XSS) vulnerability
CVE-2026-66703 is a medium vulnerability (CVSS 6.5) in Properfraction Mailoptin, published August 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 13th percentile. No source names a fixed version.
- Severity
- 6.5 MediumCVSS 3.1, CVE List
- Exploit chance
- 0.22%EPSS, 13th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
Affected products
What each source reports
CVE List Score used
WordPress MailOptin plugin <= 1.2.78.0 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.
- Record
CVE-2026-66703- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2026-53907
Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.
- Record
EUVD-2026-53907- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-7h59-5f8r-wcwf
Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.
Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.
- Record
GHSA-7h59-5f8r-wcwf- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
Contributor Cross Site Scripting (XSS) in MailOptin <= 1.2.78.0 versions.
- Record
CVE-2026-66703- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.