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GHSA-mp7c-m3rh-r56v

MediumCVSS 6.9 / 10
Published Sep 16, 2025·Last modified Sep 22, 2025
Affected Components(0)

No affected components available

Description

Impact

matrix-js-sdk before 38.2.0 has insufficient validation of room predecessor links in MatrixClient::getJoinedRooms, allowing a remote attacker to attempt to replace a tombstoned room with an unrelated attacker-supplied room.

Patches

The issue has been patched and users should upgrade to 38.2.0.

Workarounds

Avoid using MatrixClient::getJoinedRooms in favour of getRooms() and filtering upgraded rooms separately.

Risk Scores
Base Score
6.9

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
2.7

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
0.23%

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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