Joomla! 5.x < 5.4.8 Multiple Vulnerabilities

high Web App Scanning Plugin ID 115459

Synopsis

Joomla! 5.x < 5.4.8 Multiple Vulnerabilities

Description

According to its self-reported version number, the version of Joomla! installed on the remote host is prior to 5.4.8 / 6.1.3. It is, therefore, affected by multiple vulnerabilities:

- Lack of output processing allows a response header injection in the multiple download views, leading to reflected file download / content-type confusion. (CVE-2026-71572)

- An improper implementation prevents configured CORS origins from being properly validated in CORS requests. (CVE-2026-71573)

- Improper access validation permits unauthorized users to execute mutation operations through webservice endpoints. (CVE-2026-71574)

- An improper access check allows unauthorized users to create fields for inaccessible components via the custom fields webservice endpoints. (CVE-2026-72531)

- An improper access check allows unauthorized users to create categories for inaccessible components via the category webservice endpoints. (CVE-2026-72532)

- Improper escaping flags create a cross-site scripting (XSS) vulnerability through schema.org outputs. (CVE-2026-73336)

- Insufficient state checks lead to a vector that allows bypassing multi-factor authentication (MFA) checks. (CVE-2026-73337)

- An improper access check allows unauthorized users to perform copy batch operations on uneditable items. (CVE-2026-73371)

- An improper access check injects contact information for inaccessible contact items into schema.org snippets. (CVE-2026-73372)

- The default list of dangerous file types does not include SHTML files, potentially allowing unrestricted uploads that could execute as code on servers configured to process them. (CVE-2026-73373)

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Joomla! version 5.4.8 or later.

See Also

https://developer.joomla.org/security-centre.html

https://www.joomla.org/announcements/release-news/joomla-6-1-3-5-4-8-security-bugfix-release.html

Plugin Details

Severity: High

ID: 115459

Type: Version Based

Family: Component Vulnerability

Published: 9/1/2026

Updated: 9/1/2026

Scan Template: api, basic, full, pci, scan

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.18

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-71573

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS Score Source: CVE-2026-71574

CVSS v4

Risk Factor: High

Base Score: 8.9

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS Score Source: CVE-2026-73373

Vulnerability Information

CPE: cpe:2.3:a:joomla:joomla:*:*:*:*:*:*:*:*

Exploit Ease: No known exploits are available

Patch Publication Date: 8/19/2026

Vulnerability Publication Date: 8/17/2026

Reference Information

CVE: CVE-2026-71572, CVE-2026-71573, CVE-2026-71574, CVE-2026-72531, CVE-2026-72532, CVE-2026-73336, CVE-2026-73337, CVE-2026-73371, CVE-2026-73372, CVE-2026-73373

CWE: 284, 287, 434, 79, 93

OWASP: 2010-A1, 2010-A2, 2010-A3, 2010-A4, 2010-A8, 2013-A1, 2013-A2, 2013-A3, 2013-A4, 2013-A7, 2013-A9, 2017-A1, 2017-A2, 2017-A5, 2017-A7, 2017-A9, 2021-A1, 2021-A3, 2021-A4, 2021-A6, 2021-A7, 2025-A1, 2025-A5, 2025-A6, 2025-A7

WASC: Cross-Site Scripting, HTTP Response Splitting, Improper Input Handling, Insufficient Authentication, Insufficient Authorization

CAPEC: 1, 114, 115, 151, 19, 194, 209, 22, 31, 34, 441, 478, 479, 502, 503, 536, 546, 550, 551, 552, 556, 558, 562, 563, 564, 57, 578, 588, 591, 592, 593, 63, 633, 650, 85, 94

DISA STIG: APSC-DV-000460, APSC-DV-002490, APSC-DV-002560, APSC-DV-002630

HIPAA: 164.306(a)(1), 164.306(a)(2), 164.312(a)(1), 164.312(a)(2)(i)

ISO: 27001-A.12.6.1, 27001-A.13.1.1, 27001-A.14.1.2, 27001-A.14.1.3, 27001-A.14.2.5, 27001-A.18.1.3, 27001-A.6.2.2, 27001-A.9.1.2, 27001-A.9.4.1, 27001-A.9.4.4, 27001-A.9.4.5

NIST: sp800_53-AC-3, sp800_53-CM-6b, sp800_53-SC-6, sp800_53-SI-10

OWASP API: 2019-API7, 2019-API8, 2023-API8

OWASP ASVS: 4.0.2-1.4.2, 4.0.2-12.5.2, 4.0.2-14.2.1, 4.0.2-5.1.3, 4.0.2-5.3.3

PCI-DSS: 3.2-6.2, 3.2-6.5.1, 3.2-6.5.10, 3.2-6.5.7, 3.2-6.5.8