HOMEVULNERABILITIESCVE-2023-5812
HIGH

CVE-2023-5812

CWE-434Published: October 27, 2023· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

A vulnerability has been found in flusity CMS and classified as critical. Affected by this vulnerability is the function handleFileUpload of the file core/tools/upload.php. The manipulation of the argument uploaded_file leads to unrestricted upload. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The associated identifier of this vulnerability is VDB-243643.

NVD Source

Technical Analysis

CVE-2023-5812 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.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

flusity1 product(s)
flusity
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://github.com/flusity/flusity-CMS/issues/4
ADVISORYhttps://vuldb.com/?ctiid.243643
ADVISORYhttps://vuldb.com/?id.243643
ADVISORYhttps://github.com/flusity/flusity-CMS/issues/4
ADVISORYhttps://vuldb.com/?ctiid.243643
ADVISORYhttps://vuldb.com/?id.243643

All References (6)

→
https://github.com/flusity/flusity-CMS/issues/4Exploit · Issue Tracking · Third Party Advisory
→
https://vuldb.com/?ctiid.243643Permissions Required · Third Party Advisory · VDB Entry
→
https://vuldb.com/?id.243643Third Party Advisory · VDB Entry
→
https://github.com/flusity/flusity-CMS/issues/4Exploit · Issue Tracking · Third Party Advisory
→
https://vuldb.com/?ctiid.243643Permissions Required · Third Party Advisory · VDB Entry
→
https://vuldb.com/?id.243643Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2023-5812
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-434
CISA KEVNo
Affected1 vendor(s)
PublishedOct 27, 2023

Related CVEs (CWE-434)

CVE-2025-26776
10.0
CVE-2025-23953
10.0
CVE-2024-32809
10.0
CVE-2025-29009
10.0
CVE-2025-49071
10.0
CVE-2024-43243
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-5812 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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