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GHSA-8xq9-g7ch-35hg

HighCVSS 8.1 / 10
Published Oct 4, 2024·Last modified Oct 8, 2024
Affected Components(0)

No affected components available

Description

Impact

If the Parse Server option allowCustomObjectId: true is set, an attacker that is allowed to create a new user can set a custom object ID for that new user that exploits the vulnerability and acquires privileges of a specific role.

Patches

Improved validation for custom user object IDs. Session tokens for existing users with an object ID that exploits the vulnerability are now rejected.

Workarounds

  • Disable custom object IDs by setting allowCustomObjectId: false or not setting the option which defaults to false.
  • Use a Cloud Code Trigger to validate that a new user's object ID doesn't start with the prefix role:.

References

  • https://github.com/parse-community/parse-server/security/advisories/GHSA-8xq9-g7ch-35hg
  • https://github.com/parse-community/parse-server/pull/9317 (fix for Parse Server 7)
  • https://github.com/parse-community/parse-server/pull/9318 (fix for Parse Server 6)
Risk Scores
Base Score
8.1

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data.

Threat Intelligence
7.4

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.42%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

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

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