CVE-2020-36501Public exploitNetwork attack vector

Stored XSS via mis-sanitized address fields

Published Oct 22, 2021 · Updated Aug 4, 2024

Stored XSS in SugarCRM 6.5.18 allows remote authenticated users to execute scripts in another user's browser via contact address fields. The primary and alternate address state values are exchanged during submission, causing the front end to apply the wrong sanitization before storing and rendering them. A low-privileged account can submit the payload, but another user must view the saved contact or audit log for session theft, phishing, redirects, or interface manipulation.

CVSS severity5.4
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in SugarCRM 6.5.18 allows remote authenticated users to execute scripts in another user's browser via contact address fields. The primary and alternate address state values are exchanged during submission, causing the front end to apply the wrong sanitization before storing and rendering them. A low-privileged account can submit the payload, but another user must view the saved contact or audit log for session theft, phishing, redirects, or interface manipulation.

The record

CVE
CVE-2020-36501
Published
Oct 22, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2021CVE 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

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

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

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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