CVE-2021-31783Network attack vector

Server file disclosure via weak path validation

Published Apr 26, 2021 · Updated Aug 3, 2024

Local file inclusion in Piwigo LocalFilesEditor before 11.4.0.1 allows remote authenticated users to read server files. show_default.php accepts the file query parameter, tests only for allowed-name substrings, joins the value to the Piwigo root, and passes it to file_get_contents. The endpoint requires Piwigo webmaster access, and crafted traversal paths expose files readable by the web server account.

CVSS severity7.5
High
EPSS probability0.62%
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 Piwigo LocalFilesEditor before 11.4.0.1 allows remote authenticated users to read server files. show_default.php accepts the file query parameter, tests only for allowed-name substrings, joins the value to the Piwigo root, and passes it to file_get_contents. The endpoint requires Piwigo webmaster access, and crafted traversal paths expose files readable by the web server account.

The record

CVE
CVE-2021-31783
Published
Apr 26, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-345, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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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