CVE-2026-35399Public exploitNetwork attack vector

Stored browser script execution via backup filenames

Published Apr 6, 2026 · Updated Apr 6, 2026

Stored XSS in LabReDeS WeGIA before 3.6.9 allows remote attackers to execute scripts in a user's browser through a backup filename. The importar_dump.php upload path accepts a multipart gzip filename, and the backup-list deletion view renders the persisted name without neutralizing executable script syntax. A victim administrator must upload the crafted backup and later view or delete its entry, exposing session cookies and authenticated browser actions.

CVSS severity8.5
High
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 LabReDeS WeGIA before 3.6.9 allows remote attackers to execute scripts in a user's browser through a backup filename. The importar_dump.php upload path accepts a multipart gzip filename, and the backup-list deletion view renders the persisted name without neutralizing executable script syntax. A victim administrator must upload the crafted backup and later view or delete its entry, exposing session cookies and authenticated browser actions.

The record

CVE
CVE-2026-35399
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
LabReDeS - Laboratório de Redes, Desenvolvimento e Segurança
Product
WeGIA
Classifications
CWE-20, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 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=< 3.6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LabReDeS - Laboratório de Redes, Desenvolvimento e Segurança · WeGIAversion=< 3.6.9

Published CVSS scores

8.5GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
6.1NIST NVDCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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