CVE-2026-3054Public exploitNetwork attack vector

Reflected XSS via unsanitized login hint

Published Feb 24, 2026 · Updated Feb 24, 2026

Reflected XSS in Alinto SOGo 5.12.3 and 5.12.4 allows remote attackers to execute JavaScript through a crafted login URL. SOGoRootPage's getLoginHint method returns the hint query value into the login page's JavaScript string without HTML filtering or rejection of single quotes. No authentication is required, but a victim must open the crafted URL; injected code then runs in that victim's SOGo origin.

CVSS severity6.1
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Alinto SOGo 5.12.3 and 5.12.4 allows remote attackers to execute JavaScript through a crafted login URL. SOGoRootPage's getLoginHint method returns the hint query value into the login page's JavaScript string without HTML filtering or rejection of single quotes. No authentication is required, but a victim must open the crafted URL; injected code then runs in that victim's SOGo origin.

The record

CVE
CVE-2026-3054
Published
Feb 24, 2026
Updated
Feb 24, 2026
Vendor
Alinto
Product
SOGo
Classifications
CWE-79, T1204.001, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 24, 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=5.12.3
  2. Affected versionversion=5.12.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Alinto · SOGoversion=5.12.3; version=5.12.4

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.1VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C
2.1VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
4.3UbuntuCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link
T1059.007JavaScript/JScript

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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