CVE-2020-35659 Cross-site scripting in n/a
Stored XSS in Pi-hole allows attackers to execute arbitrary JavaScript in the admin interface via malicious DNS queries.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-35659?
CVE-2020-35659 is a medium-severity cross-site scripting vulnerability in n/a, published on 24 Dec 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The DNS query log in Pi-hole before 5.2.2 is vulnerable to stored XSS. An attacker with the ability to directly or indirectly query DNS with a malicious hostname can cause arbitrary JavaScript to execute when the Pi-hole administrator visits the Query Log or Long-term data Query Log page.
Weakness: CWE-79
Which versions are affected by CVE-2020-35659?
It affects 1 product.
Products include Pi-Hole Pi-Hole.
How do I fix CVE-2020-35659?
No fix has been published for CVE-2020-35659 yet. Limit exposure of the affected software until one is available.
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-2020-35659 being exploited?
There is no known exploitation of CVE-2020-35659 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2020-8816 Pi-Hole AdminLTE Remote Code Execution
- CVE-2025-34087 Pi-Hole AdminLTE Whitelist (now 'Web Allowlist') Remote Command Execution
- CVE-2026-50130 Pi-hole: Local privilege escalation from `pihole` user to root via `/etc/pihole/logrotate`
- CVE-2020-11108 File upload in n/a
- CVE-2019-13051 Pi-Hole 4.3 allows Command Injection.
Sources
Also known as GHSA-3mr8-6hjm-446f.