HOMEVULNERABILITIESCVE-2021-28938
MEDIUM

CVE-2021-28938

NVD-CWE-noinfoPublished: April 13, 2021· Updated: Jun 17, 2026

4.3
CVSS v3.1

Official Description

Siren Federate before 6.8.14-10.3.9, 6.9.x through 7.6.x before 7.6.2-20.2, 7.7.x through 7.9.x before 7.9.3-21.6, 7.10.x before 7.10.2-22.2, and 7.11.x before 7.11.2-23.0 can leak user information across thread contexts. This occurs in opportunistic circumstances when there is concurrent query execution by a low-privilege user and a high-privilege user. The former query might run with the latter query's privileges.

NVD Source

Technical Analysis

CVE-2021-28938 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

siren1 product(s)
federate
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://docs.siren.io/siren-federate-user-guide/22/siren-federate/release-notes.html
ADVISORYhttps://docs.siren.io/siren-federate-user-guide/22/siren-federate/release-notes.html

All References (2)

→
https://docs.siren.io/siren-federate-user-guide/22/siren-federate/release-notes.htmlRelease Notes · Vendor Advisory
→
https://docs.siren.io/siren-federate-user-guide/22/siren-federate/release-notes.htmlRelease Notes · Vendor Advisory

Quick Facts

CVE IDCVE-2021-28938
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedApr 13, 2021

Related CVEs (NVD-CWE-noinfo)

CVE-2012-0500
10.0
CVE-2009-1977
10.0
CVE-2009-1979
10.0
CVE-2013-2470
10.0
CVE-2010-3552
10.0
CVE-2009-1314
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-28938 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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