CVE-2026-25099Public exploitNetwork attack vector

Authenticated code execution via unrestricted API upload

Published Mar 27, 2026 · Updated Mar 27, 2026

Unrestricted file upload in Bludit before 3.18.4 allows remote authenticated users to execute code through the API plugin. The uploadFile function in bl-plugins/api/plugin.php moved the supplied filename into a web-accessible upload path without validating its extension, allowing server-executable files to be stored. Exploitation requires an enabled API plugin, a valid API token, and write permission; successful requests execute attacker-supplied code under the web server account.

CVSS severity8.7
High
EPSS probability1.92%
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 Bludit before 3.18.4 allows remote authenticated users to execute code through the API plugin. The uploadFile function in bl-plugins/api/plugin.php moved the supplied filename into a web-accessible upload path without validating its extension, allowing server-executable files to be stored. Exploitation requires an enabled API plugin, a valid API token, and write permission; successful requests execute attacker-supplied code under the web server account.

The record

CVE
CVE-2026-25099
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
Bludit
Product
Bludit
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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 <3.18.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Bludit · Bluditversion=0 <3.18.4

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7CERT.PLCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Web Shell

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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