CVE-2021-35391Network attack vector

Authenticated code execution via crafted server-side request

Published Jul 21, 2023 · Updated Jul 9, 2026

Server-side request forgery in Deskpro Support Desk 2021.21.6 allows remote authenticated users to execute code via a crafted URL. Published sources do not identify the affected endpoint or explain how the supplied URL reaches an unrestricted server-side request. Exploitation requires high privileges and no user interaction; successful requests can execute arbitrary code on the help-desk server.

CVSS severity7.2
High
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Deskpro Support Desk 2021.21.6 allows remote authenticated users to execute code via a crafted URL. Published sources do not identify the affected endpoint or explain how the supplied URL reaches an unrestricted server-side request. Exploitation requires high privileges and no user interaction; successful requests can execute arbitrary code on the help-desk server.

The record

CVE
CVE-2021-35391
Published
Jul 21, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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