CVE-2020-11889Network attack vector

Unauthorized user-group deletion via incorrect ACL check

Published Apr 21, 2020 · Updated Aug 4, 2024

Incorrect access control in Joomla! CMS 2.5.0 through 3.9.16 allows remote attackers to delete user groups through com_users. The access-level deletion path in com_users applies an incorrect ACL check before permitting a user-group deletion. The request requires no authentication or user interaction, and exploitation changes site authorization data without disclosing data or interrupting service.

CVSS severity5.3
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect access control in Joomla! CMS 2.5.0 through 3.9.16 allows remote attackers to delete user groups through com_users. The access-level deletion path in com_users applies an incorrect ACL check before permitting a user-group deletion. The request requires no authentication or user interaction, and exploitation changes site authorization data without disclosing data or interrupting service.

The record

CVE
CVE-2020-11889
Published
Apr 21, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1531
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

T1531Account Access Removal

Public exploit references

No public exploit references are available in this record.

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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