CVE-2025-34121
CVE-2025-34121 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.
Key facts
- Severity: Critical (CVSS 4.0 base score 9.3)
- EPSS exploit prediction: 2% (74th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-21749
- Weakness: CWE-306
- Published:
- Last modified:
Description
An unauthenticated arbitrary file upload vulnerability exists in Idera Up.Time Monitoring Station versions up to and including 7.2. The `wizards/post2file.php` script accepts arbitrary POST parameters, allowing attackers to upload crafted PHP files to the webroot. Successful exploitation results in remote code execution as the web server user. NOTE: The bypass for this vulnerability is tracked as CVE-2015-9263.
Frequently asked questions
- What is CVE-2025-34121?
- An unauthenticated arbitrary file upload vulnerability exists in Idera Up.Time Monitoring Station versions up to and including 7.2. The `wizards/post2file.php` script accepts arbitrary POST parameters, allowing attackers to upload crafted PHP files to the webroot. Successful exploitation results in remote code execution as the web server user. NOTE: The bypass for this vulnerability is tracked as CVE-2015-9263.
- How severe is CVE-2025-34121?
- CVE-2025-34121 has a CVSS 4.0 base score of 9.3, rated critical severity.
- Is CVE-2025-34121 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-34121?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-34121 have an EU (EUVD) identifier?
- Yes. CVE-2025-34121 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21749.
- When was CVE-2025-34121 published?
- CVE-2025-34121 was published on 2025-07-16 and last updated on 2026-06-17.
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/uptime_file_upload_1.rb
- https://web.archive.org/web/20150210113937/http://www.security-assessment.com/files/documents/advisory/Up.Time%207.2%20-%20Arbitrary%20File%20Upload.pdf
- https://www.exploit-db.com/exploits/38732
- https://www.vulncheck.com/advisories/idera-uptime-arbitrary-file-upload-rce
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