CVE-2026-48534Network attack vector

Stored XSS via unencoded IMAP server URL

Published Jul 23, 2026 · Updated Jul 23, 2026

Stored cross-site scripting in GFI Archiver before 15.13 allows remote authenticated users to execute script in other users' browsers. ImapServerWizard.SaveAllConfigSettings() stores the server URL submitted to /Archiver/ImapServerWizard.aspx without output encoding, and the configuration page later renders it as active script or HTML. Access to the IMAP Server configuration is required to plant a payload, and another user must subsequently view that page for browser-context execution.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in GFI Archiver before 15.13 allows remote authenticated users to execute script in other users' browsers. ImapServerWizard.SaveAllConfigSettings() stores the server URL submitted to /Archiver/ImapServerWizard.aspx without output encoding, and the configuration page later renders it as active script or HTML. Access to the IMAP Server configuration is required to plant a payload, and another user must subsequently view that page for browser-context execution.

The record

CVE
CVE-2026-48534
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
GFI Software
Product
GFI Archiver
Classifications
T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 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=0 <15.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GFI Software · GFI Archiverversion=0 <15.13

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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