TI-2023-16848 Aliases CVE-2023-33981 GHSA-h8qw-575q-g9c5

Briar before 1.4.22 allows attackers to spoof other users' messages in a blog, forum, or…

LOW 29CWE-354Published 2023-05-24 · Updated 2025-01-16

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Briar before 1.4.22 allows attackers to spoof other users' messages in a blog, forum, or private group, but each spoofed message would need to be an exact duplicate of a legitimate message displayed alongside the spoofed one.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00334 26th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:briarproject:briar::::::::	before 1.4.22	Vulnerable	Briarproject

cpe:2.3:a:briarproject:briar:*:*:*:*:*:*:*:* Versions before 1.4.22 Vulnerable ·Briarproject

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-33981
2026-10-03 Alias added: GHSA-h8qw-575q-g9c5

References

Exploit 1

https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/education/theses/report_YuanmingSong.pdf

Advisory 1

https://briarproject.org/news/2023-three-security-issues-found-and-fixed/

TI-2023-16847 Bramble Synchronisation Protocol (BSP) in Briar before 1.4.22 allows attackers to cause a… CVSS 3.1HIGH 7.5
TI-2023-16850 The Introduction Client in Briar through 1.5.3 does not implement out-of-band… CVSS 3.1HIGH 7.4
TI-2023-16849 Bramble Handshake Protocol (BHP) in Briar before 1.5.3 is not forward secure… CVSS 3.1MEDIUM 5.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences