CVE-2021-24823Public exploitNetwork attack vector

Arbitrary file deletion via unprotected delete-file action

Published Feb 28, 2022 · Updated Aug 3, 2024

CSRF in Schiocco Support Board before 3.3.6 allows remote attackers to delete arbitrary files through a logged-in administrator. The delete-file action in include/ajax.php passes a caller-supplied path directly to unlink when the value lacks "http," without a CSRF check. An administrator must submit or load the forged request; deleting wp-config.php permits WordPress reinstallation and subsequent code execution.

CVSS severity8.1
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Schiocco Support Board before 3.3.6 allows remote attackers to delete arbitrary files through a logged-in administrator. The delete-file action in include/ajax.php passes a caller-supplied path directly to unlink when the value lacks "http," without a CSRF check. An administrator must submit or load the forged request; deleting wp-config.php permits WordPress reinstallation and subsequent code execution.

The record

CVE
CVE-2021-24823
Published
Feb 28, 2022
Updated
Aug 3, 2024
Vendor
Schiocco
Product
Support Board
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 28, 2022CVE 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?

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

  1. Affected versionversion=3.3.6 <3.3.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Schiocco · Support Boardversion=3.3.6 <3.3.6

Published CVSS scores

8.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
4.9NVDAV:N/AC:M/Au:S/C:N/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 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-352Cross-Site Request Forgery (CSRF)
T1204.001User Execution: Malicious Link

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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