CVE-2023-5958 POST SMTP Mailer < 2.7.1 - Unauthenticated Cross-site Scripting
Unauthenticated attackers can inject malicious scripts via email content, potentially compromising highly privileged admin accounts in the POST SMTP Mailer plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-5958?
CVE-2023-5958 is a medium-severity cross-site scripting vulnerability in Unknown POST SMTP Mailer, published on 27 Nov 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2023-5958?
It affects 1 product.
Products include Wpexperts Post Smtp.
How do I fix CVE-2023-5958?
No fix has been published for CVE-2023-5958 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-5958 being exploited?
There is no known exploitation of CVE-2023-5958 in the wild and no public exploit code.
Other vulnerabilities in Unknown POST SMTP Mailer
- CVE-2023-6875 Auth bypass in Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App
- CVE-2023-3179 POST SMTP Mailer < 2.5.7 - Account Takeover via CSRF
- CVE-2023-52233 WordPress POST SMTP Mailer plugin <= 2.8.6 - Broken Access Control on API vulnerability
- CVE-2024-52436 WordPress Post SMTP plugin <= 2.9.9 - SQL Injection vulnerability
- CVE-2025-0521 Post SMTP <= 3.0.2 - Unauthenticated Stored Cross-Site Scripting
Sources
Also known as GHSA-2r79-jc6j-hh65.