How severe is CVE-2021-30492?

No CVSS score has been assigned to CVE-2021-30492 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2021-30492?

CVE-2021-30492 affects the following packages: zendesk/zendesk_api_client_php (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2021-30492?

Update zendesk/zendesk_api_client_php to 2.2.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-30492 is resolved across your whole dependency graph.

How do I detect CVE-2021-30492 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zendesk/zendesk_api_client_php, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-30492 if there is no patch (or I can't update yet)?

Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Is CVE-2021-30492 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-30492 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was CVE-2021-30492 published, and has it been updated?

CVE-2021-30492 was published on April 29, 2021 and was last updated on December 2, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2021-30492 — zendesk_api_client_php

Fix: zendesk/zendesk_api_client_php#466

CVE-2021-30492 is a security vulnerability in zendesk/zendesk_api_client_php. A fix is available for zendesk/zendesk_api_client_php — see the affected versions and patch details below.

Lack of Input Validation in zendesk_api_client_php for Zendesk Subdomain

Published

Apr 29, 2021

Updated

Dec 2, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Dec 2, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐘zendesk/zendesk_api_client_php

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Impact

Lack of input validation of the Zendesk subdomain could expose users of the library to Server Side Request Forgery (SSRF).

Resolution

Validate the provided Zendesk subdomain to be a valid subdomain in:

getAuthUrl
getAccessToken

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`zendesk/zendesk_api_client_php`	all versions	2.2.11`composer require zendesk/zendesk_api_client_php:^2.2.11`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zendesk/zendesk_api_client_php, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update zendesk/zendesk_api_client_php to 2.2.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-30492 is resolved across your whole dependency graph.
Workarounds
Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

### Impact Lack of input validation of the Zendesk subdomain could expose users of the library to Server Side Request Forgery (SSRF). ### Resolution Validate the provided Zendesk subdomain to be a valid subdomain in: * getAuthUrl * getAccessToken

O3 Security · Impact-Aware SCA

Is CVE-2021-30492 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works