CVE-2016-20098 Moderator Toolbox before 4.0.14 Stored XSS via Removal Reasons Configuration
Attackers can inject JavaScript into Reddit moderator toolbox wiki fields to execute code in moderators' sessions, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2016-20098?
CVE-2016-20098 is a medium-severity cross-site scripting vulnerability in toolbox-team reddit-moderator-toolbox, published on 9 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Moderator Toolbox (reddit-moderator-toolbox) before 4.0.14 contains a stored cross-site scripting vulnerability in the removalreasons module, which inserts subreddit toolbox wiki fields into popup HTML without encoding. Attackers who can edit the toolbox wiki page can plant JavaScript in fields like pmsubject, header, or reason titles to act with moderators' Reddit sessions.
Weakness: CWE-79
Which versions are affected by CVE-2016-20098?
How do I fix CVE-2016-20098?
No fix has been published for CVE-2016-20098 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-2016-20098 being exploited?
There is no known exploitation of CVE-2016-20098 in the wild and no public exploit code.
Sources
Also known as GHSA-78f5-pfcg-3j59.