CVE-2021-24288 AcyMailing < 7.5.0 - Unauthenticated Open Redirect
An attacker can craft a malicious link that redirects victims to a phishing site via the unsanitized redirect parameter in the AcyMailing 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-2021-24288?
CVE-2021-24288 is a medium-severity vulnerability in Newsletter via SMTP, Sendinblue, Sendgrid, Mailgun - AcyMailing SMTP Newsletter, published on 17 May 2021. 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
When subscribing using AcyMailing, the 'redirect' parameter isn't properly sanitized. Turning the request from POST to GET, an attacker can craft a link containing a potentially malicious landing page and send it to the victim.
Weakness: CWE-601
Which versions are affected by CVE-2021-24288?
It affects 1 product.
Products include Acymailing Acymailing.
How do I fix CVE-2021-24288?
No fix has been published for CVE-2021-24288 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-24288 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24288 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in Newsletter via SMTP, Sendinblue, Sendgrid, Mailgun - AcyMailing SMTP Newsletter
- CVE-2023-28731 Unauthenticated RCE affecting the AcyMailing plugin for Joomla
- CVE-2026-94132 File upload in AcyMailing Enterprise extension for Joomla
- CVE-2026-56292 Joomla Extension - acymailing.com - SQL Injection in AcyMailing extension < 10.11.1
- CVE-2026-94131 Joomla Extension - acymailing.com - Unauthenticated arbitrary file deletion in AcyMailing Enterprise extension < 11.1.0
- CVE-2024-7384 AcyMailing <= 9.7.2 - Authenticated (Subscriber+) Arbitrary File Upload via acym_extractArchive Function
Sources
Also known as GHSA-vrm9-x4ww-qpgw.