CVE-2023-41335
published 2023-09-27CVE-2023-41335: Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. When users update their passwords, the new credentials may be…
PriorityP414low3.7CVSS 3.1
AVNACHPRLUIRSUCLILAN
EPSS
0.36%
28.5th percentile
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. When users update their passwords, the new credentials may be briefly held in the server database. While this doesn't grant the server any added capabilities—it already learns the users' passwords as part of the authentication process—it does disrupt the expectation that passwords won't be stored in the database. As a result, these passwords could inadvertently be captured in database backups for a longer duration. These temporarily stored passwords are automatically erased after a 48-hour window. This issue has been addressed in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | matrix-synapse | < matrix-synapse 1.93.0-1 (forky) | matrix-synapse 1.93.0-1 (forky) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| matrix-org | synapse | — | — |
| matrix | synapse | >= 1.66.0 < 1.93.0 | 1.93.0 |
CVSS provenance
nvdv3.13.7LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
osv5.0MEDIUM
vendor_ubuntu5.0MEDIUM
vendor_debian3.7LOW
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Ubuntu
Synapse vulnerabilities
vendor_ubuntu·2025-04-22·CVSS 5.0
CVE-2023-41335 [MEDIUM] Synapse vulnerabilities
Title: Synapse vulnerabilities
Summary: Several security issues were fixed in Synapse.
It was discovered that Synapse network policies could be bypassed via
specially crafted URLs. An attacker could possibly use this issue to
bypass authentication mechanisms. (CVE-2023-32683)
It was discovered that Synapse exposed cached device information. An
attacker could possibly use this issue to gain access to sensitive
information. (CVE-2023-43796)
It was discovered that Synapse could be tricked into rejecting state
changes in rooms. An attacker could possibly use this issue to cause
Synapse to stop functioning properly, resulting in a denial of service.
This issue was only fixed in Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-39374)
It was discovered that Synapse stored user credentials in
Debian
CVE-2023-41335: matrix-synapse - Synapse is an open-source Matrix homeserver written and maintained by the Matrix...
vendor_debian·2023·CVSS 3.7
CVE-2023-41335 [LOW] CVE-2023-41335: matrix-synapse - Synapse is an open-source Matrix homeserver written and maintained by the Matrix...
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. When users update their passwords, the new credentials may be briefly held in the server database. While this doesn't grant the server any added capabilities—it already learns the users' passwords as part of the authentication process—it does disrupt the expectation that passwords won't be stored in the database. As a result, these passwords could inadvertently be captured in database backups for a longer duration. These temporarily stored passwords are automatically erased after a 48-hour window. This issue has been addressed in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.
Scope: local
forky: resolved (fixed in 1.93.0-1)
sid: resolved (fixed in 1
OSV
matrix-synapse vulnerabilities
osv·2025-04-22·CVSS 5.0
CVE-2023-32683 [MEDIUM] matrix-synapse vulnerabilities
matrix-synapse vulnerabilities
It was discovered that Synapse network policies could be bypassed via
specially crafted URLs. An attacker could possibly use this issue to
bypass authentication mechanisms. (CVE-2023-32683)
It was discovered that Synapse exposed cached device information. An
attacker could possibly use this issue to gain access to sensitive
information. (CVE-2023-43796)
It was discovered that Synapse could be tricked into rejecting state
changes in rooms. An attacker could possibly use this issue to cause
Synapse to stop functioning properly, resulting in a denial of service.
This issue was only fixed in Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-39374)
It was discovered that Synapse stored user credentials in a server's
database temporarily. An attacker could possi
OSV
CVE-2023-41335: Synapse is an open-source Matrix homeserver written and maintained by the Matrix
osv·2023-09-27·CVSS 3.7
CVE-2023-41335 [LOW] CVE-2023-41335: Synapse is an open-source Matrix homeserver written and maintained by the Matrix
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. When users update their passwords, the new credentials may be briefly held in the server database. While this doesn't grant the server any added capabilities—it already learns the users' passwords as part of the authentication process—it does disrupt the expectation that passwords won't be stored in the database. As a result, these passwords could inadvertently be captured in database backups for a longer duration. These temporarily stored passwords are automatically erased after a 48-hour window. This issue has been addressed in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.
OSV
matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes
osv·2023-09-26
CVE-2023-41335 [LOW] matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes
matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes
### Impact
When users update their passwords, the new credentials may be briefly held in the server database. While this doesn't grant the server any added capabilities—it already learns the users' passwords as part of the authentication process—it does disrupt the expectation that passwords won't be stored in the database. As a result, these passwords could inadvertently be captured in database backups for a longer duration.
These temporarily stored passwords are automatically erased after a 48-hour window.
### Patches
https://github.com/matrix-org/synapse/pull/16272
### References
This bug was due to a regression in https://github.com/matrix-org/synapse/pull/13188.
GHSA
matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes
ghsa·2023-09-26
CVE-2023-41335 [LOW] CWE-312 matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes
matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes
### Impact
When users update their passwords, the new credentials may be briefly held in the server database. While this doesn't grant the server any added capabilities—it already learns the users' passwords as part of the authentication process—it does disrupt the expectation that passwords won't be stored in the database. As a result, these passwords could inadvertently be captured in database backups for a longer duration.
These temporarily stored passwords are automatically erased after a 48-hour window.
### Patches
https://github.com/matrix-org/synapse/pull/16272
### References
This bug was due to a regression in https://github.com/matrix-org/synapse/pull/13188.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/matrix-org/synapse/pull/16272https://github.com/matrix-org/synapse/security/advisories/GHSA-4f74-84v3-j9q5https://lists.fedoraproject.org/archives/list/[email protected]/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4/https://lists.fedoraproject.org/archives/list/[email protected]/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AO/https://lists.fedoraproject.org/archives/list/[email protected]/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/https://security.gentoo.org/glsa/202401-12https://github.com/matrix-org/synapse/pull/16272https://github.com/matrix-org/synapse/security/advisories/GHSA-4f74-84v3-j9q5https://lists.fedoraproject.org/archives/list/[email protected]/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4/https://lists.fedoraproject.org/archives/list/[email protected]/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AO/https://lists.fedoraproject.org/archives/list/[email protected]/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/https://security.gentoo.org/glsa/202401-12
2023-09-27
Published