How severe is CVE-2021-35456?

CVE-2021-35456 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-35456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35456?

CVE-2021-35456 affects Online Pet Shop Web Application Project Online Pet Shop Web Application. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35456?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-35456 published?

CVE-2021-35456 was published on 2021-06-28 and last updated on 2026-06-17.

CVE-2021-35456

CVE-2021-35456 is a critical-severity vulnerability in Online Pet Shop Web Application Project Online Pet Shop Web Application with a CVSS 3.x base score of 9.8. 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-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Online Pet Shop Web Application Project Online Pet Shop Web Application
Published: 2021-06-28
Last modified: 2026-06-17

Description

Online Pet Shop We App 1.0 is vulnerable to remote SQL injection and shell upload

Frequently asked questions

What is CVE-2021-35456?: Online Pet Shop We App 1.0 is vulnerable to remote SQL injection and shell upload
How severe is CVE-2021-35456?: CVE-2021-35456 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-35456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35456?: CVE-2021-35456 affects Online Pet Shop Web Application Project Online Pet Shop Web Application. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35456?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-35456 published?: CVE-2021-35456 was published on 2021-06-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:online_pet_shop_web_application_project:online_pet_shop_web_application:1.0:*:*:*:*:*:*:*

More vulnerabilities in Online Pet Shop Web Application Project Online Pet Shop Web Application

CVE-2022-40935 — High (CVSS 7.2): Online Pet Shop We App v1.0 is vulnerable to SQL Injection via /pet_shop/classes/Master.php?f=delete_category,id.
CVE-2022-40934 — High (CVSS 7.2): Online Pet Shop We App v1.0 is vulnerable to SQL injection via /pet_shop/classes/Master.php?f=delete_sub_category,id
CVE-2022-40933 — High (CVSS 7.2): Online Pet Shop We App v1.0 by oretnom23 is vulnerable to SQL injection via…

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