How severe is CVE-2021-43156?

CVE-2021-43156 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-43156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43156?

CVE-2021-43156 affects Projectworlds Online Book Store Project In Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43156?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-43156 published?

CVE-2021-43156 was published on 2021-12-22 and last updated on 2026-06-17.

CVE-2021-43156

CVE-2021-43156 is a medium-severity vulnerability in Projectworlds Online Book Store Project In Php with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Projectworlds Online Book Store Project In Php
Published: 2021-12-22
Last modified: 2026-06-17

Description

In ProjectWorlds Online Book Store PHP 1.0 a CSRF vulnerability in admin_delete.php allows a remote attacker to delete any book.

Frequently asked questions

What is CVE-2021-43156?: In ProjectWorlds Online Book Store PHP 1.0 a CSRF vulnerability in admin_delete.php allows a remote attacker to delete any book.
How severe is CVE-2021-43156?: CVE-2021-43156 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-43156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43156?: CVE-2021-43156 affects Projectworlds Online Book Store Project In Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43156?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43156 published?: CVE-2021-43156 was published on 2021-12-22 and last updated on 2026-06-17.

References

https://github.com/projectworldsofficial/online-book-store-project-in-php/issues/19

Affected products (1)

cpe:2.3:a:projectworlds:online_book_store_project_in_php:1.0:*:*:*:*:*:*:*

More vulnerabilities in Projectworlds Online Book Store Project In Php

CVE-2021-43155 — Critical (CVSS 9.8): Projectsworlds Online Book Store PHP v1.0 is vulnerable to SQL injection via the "bookisbn" parameter in cart.php.
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CVE-2020-19113 — Critical (CVSS 9.8): Arbitrary File Upload vulnerability in Online Book Store v1.0 in admin_add.php, which may lead to remote code execution.
CVE-2020-19112 — Critical (CVSS 9.8): SQL Injection vulnerability in Online Book Store v1.0 via the bookisbn parameter to admin_delete.php, which could let a…
CVE-2020-19111 — Critical (CVSS 9.8): Incorrect Access Control vulnerability in Online Book Store v1.0 via admin_verify.php, which could let a remote…
CVE-2020-19110 — Critical (CVSS 9.8): SQL Injection vulnerability in Online Book Store v1.0 via the bookisbn parameter to book.php parameter, which could let…

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