What is CVE-2020-29259?

CVE-2020-29259 is a medium-severity vulnerability in Online Examination System Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-12-09.

How severe is CVE-2020-29259?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Online Examination System Project

CVE-2020-29259

Cross-site scripting (XSS) vulnerability in Online Examination System 1.0 via the subject or feedback parameter to feedback.php.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-12-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

Online Examination System Project — versions 1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

asfiyashaikh20.medium.com/cve-2020-29259-persistent-xss-2ef63cc5cee6 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-29259?: CVE-2020-29259 is a medium-severity vulnerability in Online Examination System Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-12-09.
How severe is CVE-2020-29259?: Medium severity. CVSS v3 base score is 5.4 out of 10.