CVE-2026-58200Public exploitNetwork attack vector

Cloud asset manipulation via unrestricted parameter signing

Published Sep 15, 2026 · Updated Sep 15, 2026

Improper parameter signing in JHB Software Payload CMS Plugins 0.3.0 through 0.3.4 allows remote authenticated users to alter cloud assets. The getGenerateSignature handler passes body.paramsToSign directly to api_sign_request without restricting keys, folders, identifiers, or timestamp freshness. Reachability requires clientUploads to be enabled and a Payload account; valid signatures permit asset replacement, visibility changes, callbacks, and cache invalidation.

CVSS severity7.1
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper parameter signing in JHB Software Payload CMS Plugins 0.3.0 through 0.3.4 allows remote authenticated users to alter cloud assets. The getGenerateSignature handler passes body.paramsToSign directly to api_sign_request without restricting keys, folders, identifiers, or timestamp freshness. Reachability requires clientUploads to be enabled and a Payload account; valid signatures permit asset replacement, visibility changes, callbacks, and cache invalidation.

The record

CVE
CVE-2026-58200
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
JHB Software
Product
Payload CMS Plugins
Classifications
CWE-347, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.3.0, < 0.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JHB Software · Payload CMS Pluginsversion=>= 0.3.0, < 0.4.0

Published CVSS scores

7.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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