CVE-2022-36059: matrix-org matrix-js-sdk Prototype Pollution

Vulnerability summary

CVE-2022-36059 is a high (CVSS 8.2) Prototype Pollution vulnerability in matrix-org matrix-js-sdk. EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 60.2% of scored vulnerabilities.

Timeline

1. 28-03-2023
   PublishedVulnerability first disclosed.
2. 18-02-2025
   Last modifiedVulnerability information updated.

Description

matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. In versions prior to 19.4.0 events sent with special strings in key places can temporarily disrupt or impede the matrix-js-sdk from functioning properly, potentially impacting the consumer's ability to process data safely. Note that the matrix-js-sdk can appear to be operating normally but be excluding or corrupting runtime data presented to the consumer. This issue has been fixed in matrix-js-sdk 19.4.0 and users are advised to upgrade. Users unable to upgrade may mitigate this issue by redacting applicable events, waiting for the sync processor to store data, and restarting the client. Alternatively, redacting the applicable events and clearing all storage will often fix most perceived issues. In some cases, no workarounds are possible.

• CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.