CVE-2020-36638Network attack vector

User impersonation via unescaped error parameter

Published Dec 30, 2022 · Updated Aug 4, 2024

Cross-site scripting in AdminServ allows remote authenticated users to execute JavaScript via a crafted error query parameter. The AdminServ::error method passes the error GET value to the page without HTML encoding, allowing the browser to interpret it as active markup. A logged-in user must persuade another user to open the crafted URL, after which script execution in the interface can impersonate that user.

CVSS severity6.1
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in AdminServ allows remote authenticated users to execute JavaScript via a crafted error query parameter. The AdminServ::error method passes the error GET value to the page without HTML encoding, allowing the browser to interpret it as active markup. A logged-in user must persuade another user to open the crafted URL, after which script execution in the interface can impersonate that user.

The record

CVE
CVE-2020-36638
Published
Dec 30, 2022
Updated
Aug 4, 2024
Vendor
Chris92de
Product
AdminServ
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 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?

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

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Chris92de · AdminServversion=n/a

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/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')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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