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CVE-2018-17856

Joomla RCE Vulnerability

7.2 HighFix available

An issue was discovered in Joomla! before 3.8.13. com_joomlaupdate allows the execution of arbitrary code. The default ACL config enabled the ability of Administrator-level users to access com_joomlaupdate and trigger code execution.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.69%Up 1.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.2

An issue was discovered in Joomla! before 3.8.13. com_joomlaupdate allows the execution of arbitrary code. The default ACL config enabled the ability of Administrator-level users to access com_joomlaupdate and trigger code execution.

Record
CVE-2018-17856
CVSS 3.0
7.2 HighCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Updated
2026-11-02
CVE List No score

An issue was discovered in Joomla! before 3.8.13. com_joomlaupdate allows the execution of arbitrary code. The default ACL config enabled the ability of Administrator-level users to access com_joomlaupdate and trigger code execution.

Record
CVE-2018-17856
Updated
2026-11-02
EUVDEUVD-2022-3411 No score

An issue was discovered in Joomla! before 3.8.13. com_joomlaupdate allows the execution of arbitrary code. The default ACL config enabled the ability of Administrator-level users to access com_joomlaupdate and trigger code execution.

Record
EUVD-2022-3411
Updated
2026-11-03
GitHub AdvisoriesGHSA-9m72-pw47-292w 7.2

Joomla RCE Vulnerability

An issue was discovered in Joomla! before 3.8.13. com_joomlaupdate allows the execution of arbitrary code. The default ACL config enabled the ability of Administrator-level users to access com_joomlaupdate and trigger code execution.

Record
GHSA-9m72-pw47-292w
CVSS 3.0
7.2 HighCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV 7.2

An issue was discovered in Joomla! before 3.8.13. com_joomlaupdate allows the execution of arbitrary code. The default ACL config enabled the ability of Administrator-level users to access com_joomlaupdate and trigger code execution.

Record
CVE-2018-17856
CVSS 3.0
7.2 HighCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-9m72-pw47-292w 7.2

Joomla RCE Vulnerability

An issue was discovered in Joomla! before 3.8.13. com_joomlaupdate allows the execution of arbitrary code. The default ACL config enabled the ability of Administrator-level users to access com_joomlaupdate and trigger code execution.

Record
GHSA-9m72-pw47-292w
CVSS 3.0
7.2 HighCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
joomla/framework
Packagist
 2.5.4 to 3.8.12
3.8.13
joomla/framework
Packagist
 2.5.4 up to 3.8.13
3.8.13

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-17856 is a high vulnerability (CVSS 7.2) in Joomla Joomla\!, published October 9, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.69%, the 85th percentile. Fixed in joomla/framework 3.8.13.

References

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