HOMEVULNERABILITIESCVE-2021-43973
HIGH

CVE-2021-43973

CWE-434Published: January 11, 2022· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

An unrestricted file upload vulnerability in /UploadPsIcon.jsp in SysAid ITIL 20.4.74 b10 allows a remote authenticated attacker to upload an arbitrary file via the file parameter in the HTTP POST body. A successful request returns the absolute, server-side filesystem path of the uploaded file.

NVD Source

Technical Analysis

CVE-2021-43973 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

sysaid1 product(s)
sysaid
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

PATCHhttps://github.com/atredispartners/advisories/blob/master/ATREDIS-2022-0001.md
PATCHhttps://github.com/atredispartners/advisories/blob/master/ATREDIS-2022-0001.md

All References (6)

→
https://github.com/atredispartners/advisories/blob/master/ATREDIS-2021-0002.mdBroken Link
→
https://github.com/atredispartners/advisories/blob/master/ATREDIS-2022-0001.mdPatch · Third Party Advisory
→
https://www.sysaid.com/it-service-management-software/incident-managementProduct
→
https://github.com/atredispartners/advisories/blob/master/ATREDIS-2021-0002.mdBroken Link
→
https://github.com/atredispartners/advisories/blob/master/ATREDIS-2022-0001.mdPatch · Third Party Advisory
→
https://www.sysaid.com/it-service-management-software/incident-managementProduct

Quick Facts

CVE IDCVE-2021-43973
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-434
CISA KEVNo
Affected1 vendor(s)
PublishedJan 11, 2022

Related CVEs (CWE-434)

CVE-2024-32809
10.0
CVE-2024-52375
10.0
CVE-2021-42645
10.0
CVE-2021-38397
10.0
CVE-2024-49216
10.0
CVE-2024-52373
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-43973 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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