code-projects Online Exam Mastering System 1.0 is vulnerable to Cross Site Scripting (XSS) in feedback.php via the "q" parameter allowing r…

published 2025-04-21 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-12375

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 1; Exploit-DB

code-projects Online Exam Mastering System 1.0 is vulnerable to Cross Site Scripting (XSS) in feedback.php via the "q" parameter allowing remote attackers to execute arbitrary code.

Timeline

2025-04-21 Published
2025-04-22 First public exploit (EDB-52272)

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-04-21)

Exploit prediction

0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-52272 code-projects Online Exam Mastering System 1.0 - Reflected Cross-Site Scripting (XSS) remote, 2025-04-22
github.com https://github.com/pruthuraut/CVE-2025-28121 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /pruthuraut/CVE-2025-28121
exploit, third-party-advisory
code-projects.org /online-exam-mastering-system-php/
product

Sources

CVE List CVE-2025-28121
NVD CVE-2025-28121

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary