CVE-2021-36919Network attack vector

Authenticated reflected XSS via unsanitized request parameters

Published Nov 26, 2021 · Updated Apr 28, 2026

Reflected XSS in Awesome Support 6.0.6 and earlier allows remote authenticated users to execute script via crafted id or assignee parameters. The ticket load-preview path reflects these request parameters into generated HTML without sufficient sanitization or output escaping. A victim must follow a crafted request while using a browser session, after which the injected script runs in that victim's site context.

CVSS severity5.4
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Awesome Support 6.0.6 and earlier allows remote authenticated users to execute script via crafted id or assignee parameters. The ticket load-preview path reflects these request parameters into generated HTML without sufficient sanitization or output escaping. A victim must follow a crafted request while using a browser session, after which the injected script runs in that victim's site context.

The record

CVE
CVE-2021-36919
Published
Nov 26, 2021
Updated
Apr 28, 2026
Vendor
Awesome Support
Product
Awesome Support
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 6.0.6 <=6.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Awesome Support · Awesome Supportversion=<= 6.0.6 <=6.0.6

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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