CVE-2018-25353 Redaxo CMS Mediapool Addon 5.5.1 Arbitrary File Upload
Authenticated attackers can upload executable files by bypassing extension blacklists, leading to arbitrary code execution on Redaxo CMS installations.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-25353?
CVE-2018-25353 is a high-severity vulnerability in Redaxo CMS Mediapool, published on 23 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Redaxo CMS Mediapool Addon 5.5.1 and older contains an arbitrary file upload vulnerability that allows authenticated users to bypass file extension blacklist restrictions. Attackers with editor accounts can upload executable files by using obfuscated extensions like php71 or php53 to evade the blacklist filter and execute arbitrary code.
Weakness: CWE-863
Which versions are affected by CVE-2018-25353?
How do I fix CVE-2018-25353?
No fix has been published for CVE-2018-25353 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-25353 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25353 exists.
Sources
Also known as GHSA-x5jj-8qq8-g67q.