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» GHSA-q9h8-gpw5-c95c
Description
util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowed_local_3pids option is enabled. This occurs because of potentially unwanted behavior in Python, in which an email.utils.parseaddr call on [email protected] @good.example.com returns the [email protected] substring.
Basic information
Type
reviewed
Severity
medium Advisory on GitHub
Open advisory ↗ Repository advisory
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Source code
Not specified Published (advisory)
2022-05-24 16:43:57 UTC
Updated
2023-09-01 21:41:51 UTC
GitHub reviewed
2023-08-01 23:30:01 UTC
NVD published
2019-04-19
EPSS Score
Score
Percentile
0.66%
71.00%
CVSS Scores
Base score
Version
Severity
Vector
5.9
3.0
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CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
CWEs
CWE id
Name
CWE-20
Improper Input Validation
Affected packages (1)
Vulnerable version ranges and first patched releases as published by GitHub.
Ecosystem
Package
Vulnerable range
First patched
Vulnerable functions
pip
matrix-sydent < 1.0.2
1.0.2
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cvelogic
Threat Intelligence