CVE-2020-22402Network attack vector

Sensitive-data disclosure via unsanitized email event handler

Published Jun 14, 2023 · Updated Jan 3, 2025

Cross-site scripting in SOGo Web Mail before 4.3.1 allows remote attackers to read sensitive user data through a crafted email. The HTML-message sanitizer fails to remove the onpointerrawupdate event-handler attribute, allowing attacker-supplied JavaScript to run in the mail viewer. A recipient must open the malicious message; execution occurs in that user's webmail session and can read or alter accessible data.

CVSS severity6.1
Medium
EPSS probability0.38%
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 SOGo Web Mail before 4.3.1 allows remote attackers to read sensitive user data through a crafted email. The HTML-message sanitizer fails to remove the onpointerrawupdate event-handler attribute, allowing attacker-supplied JavaScript to run in the mail viewer. A recipient must open the malicious message; execution occurs in that user's webmail session and can read or alter accessible data.

The record

CVE
CVE-2020-22402
Published
Jun 14, 2023
Updated
Jan 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 3, 2025Record 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1UbuntuCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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