CVE-2021-41169 Improper Neutralization HTML tags in sulu/sulu
Stored XSS in Sulu CMS allows attackers to inject malicious scripts via unsanitized HTML in tag names, potentially leading to session hijacking or code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-41169?
CVE-2021-41169 is a medium-severity cross-site scripting vulnerability in sulu, published on 21 Oct 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Sulu is an open-source PHP content management system based on the Symfony framework. In versions before 1.6.43 are subject to stored cross site scripting attacks. HTML input into Tag names is not properly sanitized. Only admin users are allowed to create tags. Users are advised to upgrade.
Weakness: CWE-79
Which versions are affected by CVE-2021-41169?
2 open source packages ship an affected version, including sulu/sulu. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
sulu/sulu Packagist | All versions | 1.6.43 |
sulu/sulu Packagist | All versions | 1.6.43 |
Products include Sulu Sulu.
How do I fix CVE-2021-41169?
Upgrade sulu/sulu to 1.6.43 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-41169 being exploited?
There is no known exploitation of CVE-2021-41169 in the wild and no public exploit code.
Other vulnerabilities in sulu
- CVE-2021-43836 PHP file inclusion in the Sulu admin panel
- CVE-2021-32737 XSS Injection in Media Collection Title was possible
- CVE-2021-43835 Privilege escalation in the Sulu Admin panel
- CVE-2024-27915 Sulu grants access to pages regardless of role permissions
- CVE-2024-47617 Reflected XSS Vulnerability in Sulu Media Bundle
Sources
Also known as GHSA-h58v-g3q6-q9fx.