CVE-2022-50908Public exploitNetwork attack vector

Stored XSS via unsanitized email attachments

Published Jan 13, 2026 · Updated Jan 13, 2026

Stored XSS in MailHog 1.0.1 allows remote attackers to execute script in an operator's browser through a crafted email attachment. The web UI renders script-bearing attachment content as active browser content instead of neutralizing it. An operator must open the captured message; the resulting same-origin script can call the HTTP API, including deleting stored messages.

CVSS severity5.1
Medium
EPSS probability0.29%
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 MailHog 1.0.1 allows remote attackers to execute script in an operator's browser through a crafted email attachment. The web UI renders script-bearing attachment content as active browser content instead of neutralizing it. An operator must open the captured message; the resulting same-origin script can call the HTTP API, including deleting stored messages.

The record

CVE
CVE-2022-50908
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
MailHog
Product
MailHog
Classifications
CWE-79, T1204.002
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=1.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

MailHog · MailHogversion=1.0.1

Published CVSS scores

7.2VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.002User Execution: Malicious File

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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