Apache JSPWiki < 2.12.4: XSS via Markdown Render in editor
CVE-2026-48910 Published on July 30, 2026
Apache JSPWiki: Markdown parser allows XSS injection in Markdown error processing
A carefully crafted editing request could trigger an XSS vulnerability
on Apache JSPWiki when parsing errors on the markdown renderer, which
could allow the attacker to execute javascript in the victim's browser
and get some sensitive information about the victim.
This issue affects Apache JSPWiki: through 2.12.3.
Users are recommended to upgrade to version 2.12.4, which fixes the issue.
Vulnerability Analysis
CVE-2026-48910 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is a Basic XSS Vulnerability?
The software receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This may allow such characters to be treated as control characters, which are executed client-side in the context of the user's session. Although this can be classified as an injection problem, the more pertinent issue is the improper conversion of such special characters to respective context-appropriate entities before displaying them to the user.
CVE-2026-48910 has been classified to as a Basic XSS vulnerability or weakness.
Products Associated with CVE-2026-48910
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Affected Versions
Apache Software Foundation Apache JSPWiki:- Before and including 2.12.3 is affected.