CVE-2025-29756

Description

SunGrow's back end users system iSolarCloud https://isolarcloud.com  uses an MQTT service to transport data from the user's connected devices to the user's web browser.  The MQTT server however did not have sufficient restrictions in place to limit the topics that a user could subscribe to.  While the data that is transmitted through the MQTT server is encrypted and the credentials for the MQTT server are obtained though an API call, the credentials could be used to subscribe to any topic and the encryption key can be used to decrypt all messages received. An attack with an account on iSolarCloud.com could extract MQTT credentials and the decryption key from the browser and then use an external program to subscribe to the topic '#' and thus recieve all messages from all connected devices.

Reserved 2025-03-11 | Published 2025-06-11 | Updated 2025-06-11 | Assigner DIVD

Problem types

CWE-862 Missing Authorization

Product status

Default status
unaffected

Any version before 7 June 2025
affected

Credits

Harm van den Brink (DIVD) finder

Frank Breedijk (DIVD) analyst

ENCS (https://encs.eu/) finder

References

csirt.divd.nl/CVE-2025-29756 third-party-advisory technical-description

csirt.divd.nl/DIVD-2025-00009 third-party-advisory

isolarcloud.com product

cve.org (CVE-2025-29756)

nvd.nist.gov (CVE-2025-29756)

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