CVE-2026-100243
Stored XSS in WikiSEO author and image properties on action=info
Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS. This issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10.
INFO
Published Date :
Sept. 29, 2026, 5:17 p.m.
Last Modified :
Sept. 29, 2026, 9:35 p.m.
Remotely Exploit :
No
Source :
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
Affected Products
The following products are affected by CVE-2026-100243
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Mediawiki WikiSEO Extension to version 1.46.1 or later.
- Apply security patches for affected versions.
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-2026-100243.
| URL | Resource |
|---|---|
| https://gerrit.wikimedia.org/r/q/Iff6ef320017649750e5c6723a91ee298eb97a408 | |
| https://phabricator.wikimedia.org/T430896 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-100243 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-2026-100243
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-2026-100243 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-100243 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.
-
New CVE Received by c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
Sep. 29, 2026
Action Type Old Value New Value Added Description Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS. This issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10. Added CWE CWE-79 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/100xxx/CVE-2026-100243.json">CVE-2026-100243</a> Added Reference https://gerrit.wikimedia.org/r/q/Iff6ef320017649750e5c6723a91ee298eb97a408 Added Reference https://phabricator.wikimedia.org/T430896