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CVE-2023-41335

15
FAUCET Score

CVE-2023-41335 affects Synapse, an open-source Matrix homeserver, where newly updated user passwords are temporarily stored in the server database for up to 48 hours. This vulnerability, rated as LOW severity (CVSS 3.7), stems from an unexpected storage practice that could lead to passwords being captured in database backups, potentially exposing them. While the server already handles passwords during authentication, this issue violates the expectation of non-storage. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.66.0, < 1.93.0CPE matchmatch criteria
cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*
37CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
38CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
0.6
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 71st percentile among its peer group of 56 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: matrix-synapseFixed in: 1.93.0

Vendor Advisories (1)

pipGHSA-4f74-84v3-j9q5low

matrix-synapse vulnerable to temporary storage of plaintext passwords during password changes

Sep 26, 2023

References

github.com / matrix-org/synapse/pull/16272
Patch
github.com / matrix-org/synapse/security/advisories/GHSA-4f74-84v3-j9q5
PatchVendor Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4
Mailing ListRelease Notes
lists.fedoraproject.org / archives/list/[email protected]/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AO
Mailing ListRelease Notes
lists.fedoraproject.org / archives/list/[email protected]/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY
security.gentoo.org / glsa/202401-12