CVE-2026-73373
Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2
Description
Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The default list of dangerous files did not include SHTML files. On servers that executed these files, that could lead to code execution.
INFO
Published Date :
Aug. 18, 2026, 4:18 p.m.
Last Modified :
Aug. 19, 2026, 4:17 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | 6ff30186-7fb7-4ad9-be33-533e7b05e586 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Joomla to the latest secure version.
- Verify the file upload restrictions configuration.
- Ensure dangerous file types are properly filtered.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-73373.
| URL | Resource |
|---|---|
| https://developer.joomla.org/security-centre/1077-20260810-core-unrestricted-uploads-of-shtml-files.html | |
| https://www.joomla.org/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-73373 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-73373
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-73373 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-73373 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 19, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-73373', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-18T19:02:13.643752Z'} {'id': 'CVE-2026-73373', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-18T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 18, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-73373', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-18T19:02:13.643752Z'} -
CVE Modified by [email protected]
Aug. 18, 2026
Action Type Old Value New Value Added Reference https://developer.joomla.org/security-centre/1077-20260810-core-unrestricted-uploads-of-shtml-files.html Removed Reference https://developer.joomla.org/security-centre/20260810-core-unrestricted-uploads-of-shtml-files.html -
New CVE Received by [email protected]
Aug. 18, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Joomla! Project', 'product': 'Joomla! CMS', 'versions': [{'status': 'affected', 'version': '1.0.0-5.4.6'}, {'status': 'affected', 'version': '6.0.0-6.1.2'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Joomla! Project', 'product': 'Joomla! Framework Filesystem package', 'versions': [{'status': 'affected', 'version': '1.0.0-3.3.0'}, {'status': 'affected', 'version': '4.0.0-4.2.0'}], 'defaultStatus': 'unaffected'}] Added Description Joomla! Core - [20260810] - Unrestricted uploads of SHTML files in Joomla 1.0.0-5.4.7, 6.0.0-6.1.2 - The default list of dangerous files did not include SHTML files. On servers that executed these files, that could lead to code execution. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-434 Added Reference https://developer.joomla.org/security-centre/20260810-core-unrestricted-uploads-of-shtml-files.html Added Reference https://www.joomla.org/