CVE-2020-13695Public exploit

Root file disclosure via passwordless sudo grep

Published Jun 1, 2020 · Updated Aug 4, 2024

Privilege mismanagement in QuickBox Community Edition through 2.5.5 and Pro Edition through 2.1.8 allows attackers to read root-only files. The sudoers policy lets the www-data account run grep as root without a password, so controlled paths can expose /etc/shadow and QuickBox credential databases under /root. Control of the local www-data account is required, and disclosure of stored credentials can enable subsequent administrator and root access.

CVSS severity7.2
High
EPSS probability1.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege mismanagement in QuickBox Community Edition through 2.5.5 and Pro Edition through 2.1.8 allows attackers to read root-only files. The sudoers policy lets the www-data account run grep as root without a password, so controlled paths can expose /etc/shadow and QuickBox credential databases under /root. Control of the local www-data account is required, and disclosure of stored credentials can enable subsequent administrator and root access.

The record

CVE
CVE-2020-13695
Published
Jun 1, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, CWE-269, T1548.003
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2020CVE 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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-269Improper Privilege Management
T1548.003Sudo and Sudo Caching

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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