XSS in Ultimatefosters Ultimatepos
CVE-2025-60503
A cross-site scripting (XSS) vulnerability exists in the administrative interface of ultimatefosters UltimatePOS 4.8 where input submitted in the purchase functionality is reflected without proper escaping in the admin log panel page in the 'reference No.' field. This flaw allows an authenticated attacker to execute arbitrary JavaScript in the context of an administrator's browser session, which could lead to session hijacking or other malicious actions.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Ultimatefosters Ultimatepos — versions 4.8
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ultimatefosters.com (Product)
- github.com/H4zaz/CVE-2025-60503 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-60503?
- CVE-2025-60503 is a high-severity vulnerability in Ultimatefosters Ultimatepos, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2025-11-03.
- How severe is CVE-2025-60503?
- High severity. CVSS v3 base score is 8.7 out of 10.
- Is CVE-2025-60503 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.