CVE-2026-2831 MailArchiver <= 4.5.0 - Authenticated (Admininistrator+) SQL Injection via 'logid' Parameter
Authenticated administrators can exploit SQL injection in the MailArchiver plugin to extract sensitive database information.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2831?
CVE-2026-2831 is a medium-severity SQL injection vulnerability in pierrelannoy MailArchiver, published on 27 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The MailArchiver plugin for WordPress is vulnerable to SQL Injection via the ‘logid’ parameter in all versions up to, and including, 4.5.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Weakness: CWE-89
Which versions are affected by CVE-2026-2831?
How do I fix CVE-2026-2831?
No fix has been published for CVE-2026-2831 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-2831 being exploited?
There is no known exploitation of CVE-2026-2831 in the wild and no public exploit code.
Sources
Also known as GHSA-xw84-4gx9-vm4h.