What is CVE-2021-43155?

CVE-2021-43155 is a critical-severity vulnerability in Projectworlds Online Book Store Project In PHP, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-12-22.

How severe is CVE-2021-43155?

Critical severity. CVSS v3 base score is 9.8 out of 10.

SQL Injection in Projectworlds Online Book Store Project In PHP

CVE-2021-43155

Projectsworlds Online Book Store PHP v1.0 is vulnerable to SQL injection via the "bookisbn" parameter in cart.php.

Vulnerability class: SQL Injection

Published 2021-12-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Projectworlds Online Book Store Project In PHP — versions 1.0

Weakness classification (CWE)

CWE-89 — SQL Injection

References

github.com/projectworldsofficial/online-book-store-project-in-php/issues/18 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-43155?: CVE-2021-43155 is a critical-severity vulnerability in Projectworlds Online Book Store Project In PHP, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-12-22.
How severe is CVE-2021-43155?: Critical severity. CVSS v3 base score is 9.8 out of 10.