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GHSA-9prm-jqwx-45x9

MediumCVSS 6.3 / 10
Published May 31, 2023·Last modified Dec 6, 2023
Affected Components(0)

No affected components available

Description

Impact

Phishing attack vulnerability by uploading malicious files. A malicious user could upload a HTML file to Parse Server via its public API. That HTML file would then be accessible at the internet domain at which Parse Server is hosted. The URL of the the uploaded HTML could be shared for phishing attacks. The HTML page may seem legitimate because it is served under the internet domain where Parse Server is hosted, which may be the same as a company's official website domain.

An additional security issue arises when the Parse JavaScript SDK is used. The SDK stores sessions in the internet browser's local storage, which usually restricts data access depending on the internet domain. A malicious HTML file could contain a script that retrieves the user's session token from local storage and then share it with the attacker.

Patches

The fix adds a new Parse Server option fileUpload.fileExtensions to restrict file upload on Parse Server by file extension. It is recommended to restrict file upload for HTML file extensions, which this fix disables by default. If an app requires upload of files with HTML file extensions, the option can be set to ['.*'] or another custom value to override the default.

References

  • https://github.com/parse-community/parse-server/security/advisories/GHSA-9prm-jqwx-45x9
  • https://github.com/parse-community/parse-server/pull/8538 (Parse Server 6)
  • https://github.com/parse-community/parse-server/pull/8537 (Parse Server 5)
Risk Scores
Base Score
6.3

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information.

Threat Intelligence
5.8

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2023-32689
    Alias
  • EUVD-2023-1517
    Alias

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Medium severity
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