Jhb-software Payload Plugins up to 0.3.x Cloudinary Signature getGenerateSignature.ts cloudinary.utils.api_sign_request paramsToSign improper authorization

Summaryinfo

A vulnerability labeled as problematic has been found in Jhb-software Payload Plugins up to 0.3.x. Affected by this issue is the function cloudinary.utils.api_sign_request of the file cloudinary/src/getGenerateSignature.ts of the component Cloudinary Signature Handler. Such manipulation of the argument paramsToSign leads to improper authorization. This vulnerability is uniquely identified as CVE-2026-58200. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Jhb-software Payload Plugins up to 0.3.x. Affected by this issue is the function cloudinary.utils.api_sign_request of the file cloudinary/src/getGenerateSignature.ts of the component Cloudinary Signature Handler. The manipulation of the argument paramsToSign with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity, and availability. CVE summarizes:

Payload Plugins is a collection of plugins designed to enhance Payload CMS. From 0.3.0 until 0.4.0, @jhb.software/payload-cloudinary-plugin deployments with clientUploads enabled expose POST /api/cloudinary-generate-signature, whose handler in cloudinary/src/getGenerateSignature.ts passes attacker-controlled body.paramsToSign directly to cloudinary.utils.api_sign_request without a key allowlist, collection policy, timestamp freshness check, or configured-folder enforcement. Any authenticated Payload user can obtain a valid Cloudinary HMAC-SHA1 signature for unauthorized parameters such as overwrite, type, notification_url, invalidate, folder, and public_id. The signature can authorize asset replacement, upload visibility changes, callbacks to attacker-selected URLs, cache invalidation, and uploads outside the intended folder. The client-visible Cloudinary API key is expected by the upload design, but the unrestricted server-side signature supplies the authorization value needed to complete these operations. This vulnerability is fixed in 0.4.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-58200 since 06/29/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 0.4.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-78825). Once again VulDB remains the best source for vulnerability data.

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Vendor

• Jhb-software

Name

• Payload Plugins

Version

• 0.1
• 0.2
• 0.3

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Once again VulDB remains the best source for vulnerability data.

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