MEDIUM
CVE-2021-3729
CWE-352Published: August 23, 2021· Updated: Jun 17, 2026
4.3
CVSS v3.1
Official Description
firefly-iii is vulnerable to Cross-Site Request Forgery (CSRF)
Technical Analysis
CVE-2021-3729 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected Vendors & Products
firefly-iii1 product(s)
firefly iii
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
All References (4)
→
https://github.com/firefly-iii/firefly-iii/commit/06d319cd71b7787aa919b3ba1ccf51e4ade67712Patch · Third Party Advisory
→
https://huntr.dev/bounties/d32f3d5a-0738-41ba-89de-34f2a772de76Third Party Advisory
→
https://github.com/firefly-iii/firefly-iii/commit/06d319cd71b7787aa919b3ba1ccf51e4ade67712Patch · Third Party Advisory
→
https://huntr.dev/bounties/d32f3d5a-0738-41ba-89de-34f2a772de76Third Party Advisory
Quick Facts
CVE IDCVE-2021-3729
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-352
CISA KEVNo
Affected1 vendor(s)
PublishedAug 23, 2021
Related CVEs (CWE-352)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-3729 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.COM. CVE data is provided under the NVD usage policy.