CVE-2021-43973Known exploitationPublic exploitNetwork attack vector

Authenticated arbitrary file upload via UploadPsIcon.jsp

Published Jan 11, 2022 · Updated Aug 4, 2024

Unrestricted file upload in SysAid ITIL 20.4.74 b10 allows remote authenticated users to store arbitrary files through UploadPsIcon.jsp. The endpoint accepts the multipart file value without restricting dangerous file types and returns the uploaded file's absolute server path. An authenticated session, request token, and required Referer are needed; the upload alone does not expose the file through the web server, but it enables code execution when chained with the separate arbitrary-file-copy flaw.

CVSS severity8.8
High
EPSS probability1.71%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in SysAid ITIL 20.4.74 b10 allows remote authenticated users to store arbitrary files through UploadPsIcon.jsp. The endpoint accepts the multipart file value without restricting dangerous file types and returns the uploaded file's absolute server path. An authenticated session, request token, and required Referer are needed; the upload alone does not expose the file through the web server, but it enables code execution when chained with the separate arbitrary-file-copy flaw.

The record

CVE
CVE-2021-43973
Published
Jan 11, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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