CVE-2021-47978Public exploit

Unauthenticated file disclosure via URL path traversal

Published May 16, 2026 · Updated May 16, 2026

Local file inclusion in ProcessMaker 3.5.4 and earlier allows attackers to read arbitrary server files via a crafted HTTP path. The web root resolves nested directory-traversal sequences outside its document root and returns files such as /etc/passwd. No authentication is required, and disclosure is limited to files readable by the web-service account; no code execution is demonstrated.

CVSS severity6.9
Medium
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local file inclusion in ProcessMaker 3.5.4 and earlier allows attackers to read arbitrary server files via a crafted HTTP path. The web root resolves nested directory-traversal sequences outside its document root and returns files such as /etc/passwd. No authentication is required, and disclosure is limited to files readable by the web-service account; no code execution is demonstrated.

The record

CVE
CVE-2021-47978
Published
May 16, 2026
Updated
May 16, 2026
Vendor
ProcessMaker
Product
ProcessMaker
Classifications
CWE-98, T1190
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2026CVE publishedPublication date reported by the CVE source.
  2. May 16, 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 <=3.5.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

ProcessMaker · ProcessMakerversion=0 <=3.5.4

Published CVSS scores

6.2VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.9VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-98Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
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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