RCE in Sourcecodester Online Quiz System
CVE-2026-4973
A vulnerability was detected in SourceCodester Online Quiz System up to 1.0. Affected by this vulnerability is an unknown functionality of the file endpoint/add-question.php. Performing a manipulation of the argument quiz_question results in cross site scripting. It is possible to initiate the attack remotely. The exploit is now public and may be used.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Sourcecodester Online Quiz System — versions 1.0
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- gist.github.com/Mohdanass/5992b65cca5612c036f1d31d8d8f0646 (exploit)
- www.sourcecodester.com/ (product)
Frequently asked questions
- What is CVE-2026-4973?
- CVE-2026-4973 is a low-severity vulnerability in Sourcecodester Online Quiz System, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-03-27.
- How severe is CVE-2026-4973?
- Low severity. CVSS v3 base score is 3.5 out of 10.