CVE-2020-23766Public exploitNetwork attack vector

Administrator file deletion via unrestricted backup path

Published May 21, 2021 · Updated Aug 4, 2024

Path traversal in HTMLy 2.7.5 allows remote authenticated users with Administrator privileges to delete arbitrary server files. The backup deletion handler in system/admin/views/backup-start.html.php passes the file GET parameter directly to unlink() without restricting it to a backup directory. An Administrator session and access to the backup page are required; deletion is limited to files permitted by the web-server process.

CVSS severity6.5
Medium
EPSS probability1.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in HTMLy 2.7.5 allows remote authenticated users with Administrator privileges to delete arbitrary server files. The backup deletion handler in system/admin/views/backup-start.html.php passes the file GET parameter directly to unlink() without restricting it to a backup directory. An Administrator session and access to the backup page are required; deletion is limited to files permitted by the web-server process.

The record

CVE
CVE-2020-23766
Published
May 21, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1070.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

5.5NIST NVDAV:N/AC:L/Au:S/C:N/I:P/A:P
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1070.004File Deletion

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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