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TI-2023-05489 Aliases CVE-2023-5958GHSA-2r79-jc6j-hh65

POST SMTP Mailer < 2.7.1 - Unauthenticated Cross-site Scripting

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

The POST SMTP Mailer WordPress plugin before 2.7.1 does not escape email message content before displaying it in the backend, allowing an unauthenticated attacker to perform XSS attacks against highly privileged users.

Why it matters now

EPSS 0.0051 43rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed POST SMTP Mailer (Unknown): 2.7.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownPOST SMTP Mailerbefore 2.7.12.7.1Patch availableCNA
  • POST SMTP Mailer VendorUnknown Affected before 2.7.1 Fixed in 2.7.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wpexperts:post_smtp:*:*:*:*:*:wordpress:*:*before 2.7.1VulnerableWPExperts
  • cpe:2.3:a:wpexperts:post_smtp:*:*:*:*:*:wordpress:*:* Versions before 2.7.1 Vulnerable ·WPExperts

Remediation

  • Fix · CNA POST SMTP Mailer (Unknown) Fixed in 2.7.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-5958
  2. 2026-10-03 Alias added: GHSA-2r79-jc6j-hh65

References

Exploit 1

  • TI-2023-06280 Authorization bypass in saadiqbal Post SMTP – Complete Email Deliverability and SMTP… CVSS 3.1CRITICAL 9.8
  • TI-2023-02978 POST SMTP Mailer < 2.5.7 - Account Takeover via CSRF CVSS 3.1HIGH 8.8
  • TI-2023-06067 Post SMTP < 2.8.7 - Admin+ SQL Injection CVSS 3.1HIGH 7.2
  • TI-2022-02171 Post SMTP < 2.1.7 - Admin+ Blind SSRF CVSS 3.1HIGH 7.2
  • TI-2023-06068 Post SMTP < 2.8.7 - Reflected Cross-Site Scripting CVSS 3.1MEDIUM 6.1
  • TI-2023-02977 POST SMTP Mailer < 2.5.7 - Arbitrary Log Deletion via CSRF CVSS 3.1MEDIUM 4.3
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences