CVE-2021-43633
Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts...
Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts valid scripts into the chat, the script will be executed on the receiver chat.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts valid scripts into the chat, the script will be executed on the receiver chat.
- Record
CVE-2021-43633- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts valid scripts into the chat, the script will be executed on the receiver chat.
- Record
CVE-2021-43633- Updated
- 2026-11-02
EUVDEUVD-2021-30545 No score
Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts valid scripts into the chat, the script will be executed on the receiver chat.
- Record
EUVD-2021-30545- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w53f-mxhv-c2p3
Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts...
Sourcecodester Messaging Web Application 1.0 is vulnerable to stored XSS. If a sender inserts valid scripts into the chat, the script will be executed on the receiver chat.
- Record
GHSA-w53f-mxhv-c2p3- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43633 is a medium vulnerability (CVSS 5.4) in Messaging Web Application Project Web Application, published April 14, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. No source names a fixed version.
References
sourcecodester.com/php/14996/messaging-web-application-phpoop-free-source-code.html
medium.com/%40shaunwhorton/how-i-found-two-different-xss-vulnerabilities-a491144e8494
nvd.nist.gov/vuln/detail/CVE-2021-43633
github.com/advisories/GHSA-w53f-mxhv-c2p3