CVE-2023-26782Public exploitNetwork attack vector

Authenticated site outage via unescaped cache character

Published Apr 28, 2023 · Updated Jan 31, 2025

Denial of service in mccms 2.6.1 allows remote authenticated users to make the website return HTTP 500 errors through cache settings. The cache_save function in sys/apps/controllers/admin/Setting.php writes the Cache_Rand value into cache.php without neutralizing a trailing backslash, which escapes a quote and leaves generated PHP invalid. Access to the backend cache configuration is required; a crafted Cache_Rand value leaves the website returning HTTP 500 responses.

CVSS severity6.5
Medium
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in mccms 2.6.1 allows remote authenticated users to make the website return HTTP 500 errors through cache settings. The cache_save function in sys/apps/controllers/admin/Setting.php writes the Cache_Rand value into cache.php without neutralizing a trailing backslash, which escapes a quote and leaves generated PHP invalid. Access to the backend cache configuration is required; a crafted Cache_Rand value leaves the website returning HTTP 500 responses.

The record

CVE
CVE-2023-26782
Published
Apr 28, 2023
Updated
Jan 31, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 31, 2025Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1499.004Application or System Exploitation

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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