CVE-2017-18048
Monstra CMS 3.0.4 allows users to upload arbitrary files, which leads to remote command execution on the server, for example because .php (lowercase) is blocked but .PHP (uppercase) is not.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 63.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
Monstra CMS 3.0.4 allows users to upload arbitrary files, which leads to remote command execution on the server, for example because .php (lowercase) is blocked but .PHP (uppercase) is not.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 63.35% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- monstra/monstra
- Source
- cve@mitre.org
EPSS moved from 59.4% on 21 September 2026 to 63.4% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://blogs.securiteam.com/index.php/archives/3559Exploit, Third Party Advisory
- https://github.com/monstra-cms/monstra/issues/426Patch, Third Party Advisory
- https://securityprince.blogspot.in/2017/12/monstra-cms-304-arbitrary-file-upload.htmlExploit, Third Party Advisory
- https://www.exploit-db.com/exploits/43348/Exploit, Third Party Advisory, VDB Entry
- https://blogs.securiteam.com/index.php/archives/3559Exploit, Third Party Advisory
- https://github.com/monstra-cms/monstra/issues/426Patch, Third Party Advisory
- https://securityprince.blogspot.in/2017/12/monstra-cms-304-arbitrary-file-upload.htmlExploit, Third Party Advisory
- https://www.exploit-db.com/exploits/43348/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.