Post SMTP: Cross-site scripting
Post SMTP is affected by cross-site scripting. The vulnerable path is reachable without authentication. Injected script can execute in the affected site's origin when the vulnerable output is viewed. The published affected range is n/a through 3.6.2.
- Component
- Post SMTP
- Plugin slug
post-smtp- Affected
- n/a through 3.6.2
- Safe version
3.6.3- Published
- Jun 15, 2026
This CVE was published Jun 15, 2026 and is one of 27 known issues for this plugin.
Update, patch or deactivate.
Update Post SMTP to 3.6.3 or later, or disable and remove it until a fixed version is available.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
Unauthenticated Cross Site Scripting (XSS) in Post SMTP <= 3.6.2 versions.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L