Sensitive Information Exposure

Matrix-synapse is vulnerable to information disclosure. The vulnerability is due to improper handling of Sliding Sync, which can leak partial room state changes to users who are no longer in a room, while non-state events remain unaffected...

Improper Input Validation

Synapse is vulnerable to Improper Input Validation. The vulnerability is due to improper validation of invites received over federation, allowing a malicious server to send crafted invites that disrupt the affected user's ability to perform /sync operations...

Arbitrary File Upload

Synapse is vulnerable to Arbitrary File Upload. The vulnerability is due to improper handling of uncommon image formats during thumbnail generation, which could invoke external tools like Ghostscript, increasing the risk of exploitation...

DEBIAN-CVE-2024-37303

Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the...

UBUNTU-CVE-2024-52815

Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects su...

UBUNTU-CVE-2024-53863

Synapse is an open-source Matrix homeserver. In Synapse versions before 1.120.1, enabling the dynamicthumbnails option or processing a specially crafted request could trigger the decoding and thumbnail generation of uncommon image formats, potentially invoking external tools like Ghostscript for...

CVE-2024-52815 Synapse allows a a malformed invite to break the invitee's `/sync`

Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects su...

CVE-2024-53867 Synapse Matrix has a partial room state leak via Sliding Sync

Synapse is an open-source Matrix homeserver. The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected. This vulnerability is fixed in 1.120.1...

CVE-2024-53863 Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decoders

Synapse is an open-source Matrix homeserver. In Synapse versions before 1.120.1, enabling the dynamicthumbnails option or processing a specially crafted request could trigger the decoding and thumbnail generation of uncommon image formats, potentially invoking external tools like Ghostscript for...

PT-2024-35961

Name of the Vulnerable Software and Affected Versions: Synapse versions prior to 1.120.1 Description: Synapse is an open-source Matrix homeserver. Enabling the dynamic thumbnails option or processing a specially crafted request could trigger the decoding and thumbnail generation of uncommon image...

PYSEC-2024-50

Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate...

raiden (>=0.100.2 <=0.100.3rc1) potentially affected by CVE-2024-31208 via matrix-synapse (=0.33.9)

matrix-synapse PYPI version =0.33.9 is affected by a known vulnerability. The following packages have a transitive dependency on matrix-synapse and may be impacted: - raiden =0.100.2, =0.100.3rc1 Source cves: CVE-2024-31208 Source advisory: OSV:PYSEC-2024-50...

SUSE CVE-2023-43796

Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or...

UBUNTU-CVE-2023-43796

Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or...

SUSE CVE-2023-45129

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation which...

PYSEC-2023-199

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation which...

UBUNTU-CVE-2023-42453

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event if they knew the room ID and event ID. Note that the users were not able to view the events, but simply mark it as read. This could be confusing as...

SUSE CVE-2023-32683

Synapse is a Matrix protocol homeserver written in Python with the Twisted framework. A discovered oEmbed or image URL can bypass the urlpreviewurlblacklist setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the...

matrix-server-isenguard (>=0.1.1 <=0.2.0), matrix-synapse-testutils (>=1.65.0.0 <=1.84.1.0) +7 more potentially affected by CVE-2023-32683 via matrix-synapse (>=0.33.9 <=1.84.1)

matrix-synapse PYPI version =0.33.9, =0.1.1, =1.65.0.0, =0.1.2, =0.100.2, =0.1.0, =0.1.0, =0.8.0, =0.8.4 Source cves: CVE-2023-32683 Source advisory: OSV:PYSEC-2023-85...

PYSEC-2023-66

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the current state of that...