CVE-2023-0291Public exploitNetwork attack vector

Unauthenticated media deletion via unchecked attachment identifier

Published Jun 9, 2023 · Updated Apr 8, 2026

Authorization bypass in ExpressTech Systems Quiz and Survey Master 8.0.8 and earlier allows remote attackers to delete WordPress media. The unauthenticated qsm_remove_file_fd_question AJAX handler passes its caller-supplied media_id to wp_delete_attachment() without a capability or ownership check. Any network client that can reach admin-ajax.php can permanently remove uploaded media whose numeric identifier is known or guessed.

CVSS severity7.2
High
EPSS probability2.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in ExpressTech Systems Quiz and Survey Master 8.0.8 and earlier allows remote attackers to delete WordPress media. The unauthenticated qsm_remove_file_fd_question AJAX handler passes its caller-supplied media_id to wp_delete_attachment() without a capability or ownership check. Any network client that can reach admin-ajax.php can permanently remove uploaded media whose numeric identifier is known or guessed.

The record

CVE
CVE-2023-0291
Published
Jun 9, 2023
Updated
Apr 8, 2026
Vendor
ExpressTech Systems
Product
Quiz and Survey Master
Classifications
CWE-862, T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=8.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ExpressTech Systems · Quiz and Survey Masterversion=0 <=8.0.8

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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-862Missing Authorization
T1485Data Destruction

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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