Description
Cross-site scripting (XSS) vulnerability in HTML Purifier before 4.1.1, as used in Mahara and other products, when the browser is Internet Explorer, allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | php-htmlpurifier | 4.1.1+dfsg1-1 | — |
| Debian 12 | php-htmlpurifier | 4.1.1+dfsg1-1 | — |
| Debian 5.0 | mahara | 1.0.4-4+lenny6 | DSA-2067-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | ezyang/htmlpurifier | < 4.1.1 | 4.1.1 | GHSA-6rm6-mjmh-86jq |
Advisories 1
- DSA-2067-1 mahara - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 39613 third-party-advisory
- http://wiki.mahara.org/Release_Notes/1.1.9
- http://htmlpurifier.org/news/2010/0531-4.1.1-released
- 41259 vdb-entry
- http://wiki.mahara.org/Release_Notes/1.2.5
- http://repo.or.cz/w/htmlpurifier.git/commitdiff/18e538317a877a0509ae71a860429c41770da230
- http://wiki.mahara.org/Release_Notes/1.0.15
- 40431 third-party-advisory