CVE-2023-48104Public exploitNetwork attack vector

Credential theft via unsanitized HTML form tags

Published Jan 16, 2024 · Updated Jun 20, 2025

HTML injection in Alinto SOGo before 5.9.1 allows remote attackers to present a credential-stealing form in an email message. The stringWithoutHTMLInjection sanitizer fails to neutralize form tags in HTML mail bodies, leaving attacker-controlled form actions active. Exploitation requires a recipient to view the crafted message and submit the injected form, which sends entered data to the attacker.

CVSS severity6.1
Medium
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in Alinto SOGo before 5.9.1 allows remote attackers to present a credential-stealing form in an email message. The stringWithoutHTMLInjection sanitizer fails to neutralize form tags in HTML mail bodies, leaving attacker-controlled form actions active. Exploitation requires a recipient to view the crafted message and submit the injected form, which sends entered data to the attacker.

The record

CVE
CVE-2023-48104
Published
Jan 16, 2024
Updated
Jun 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, CWE-79, T1566
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 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

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1566Phishing

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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