CVE-2025-8526Public exploitNetwork attack vector

Stored script execution via unchecked file upload

Published Aug 4, 2025 · Updated Aug 5, 2025

Unrestricted file upload in Exrick XBoot 3.3.0 through 3.3.4 allows remote authenticated users to store dangerous files. UploadController's /xboot/upload/file handler sends multipart or base64 content to Qiniu after CommonUtil.renamePic preserves the supplied extension, without checking file type or content. A valid access token reaches the endpoint, and a stored HTML payload executes script when retrieved in another user's browser.

CVSS severity9.8
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Exrick XBoot 3.3.0 through 3.3.4 allows remote authenticated users to store dangerous files. UploadController's /xboot/upload/file handler sends multipart or base64 content to Qiniu after CommonUtil.renamePic preserves the supplied extension, without checking file type or content. A valid access token reaches the endpoint, and a stored HTML payload executes script when retrieved in another user's browser.

The record

CVE
CVE-2025-8526
Published
Aug 4, 2025
Updated
Aug 5, 2025
Vendor
Exrick
Product
XBoot
Classifications
CWE-284, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.3.0
  2. Affected versionversion=3.3.1
  3. Affected versionversion=3.3.2
  4. Affected versionversion=3.3.3
  5. Affected versionversion=3.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Exrick · XBootversion=3.3.0; version=3.3.1; version=3.3.2; version=3.3.3; version=3.3.4

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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