CVE-2019-9955 Cross-site scripting in n/a
Attackers can execute arbitrary scripts in the victim's browser via the firewall login page, potentially stealing session cookies or credentials.
- 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-2019-9955?
CVE-2019-9955 is a medium-severity cross-site scripting vulnerability in n/a, published on 22 Apr 2019. 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
On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110, USG210, USG310, USG1100, USG1900, USG2200-VPN, ZyWALL 110, ZyWALL 310, ZyWALL 1100 devices, the security firewall login page is vulnerable to Reflected XSS via the unsanitized 'mp_idx' parameter.
Weakness: CWE-79
Which versions are affected by CVE-2019-9955?
It affects 21 products.
Products include Zyxel Atp200 Firmware, Zyxel Atp500 Firmware, Zyxel Atp800 Firmware, Zyxel Usg1100 Firmware, Zyxel Usg110 Firmware, Zyxel Usg1900 Firmware and 15 more.
How do I fix CVE-2019-9955?
No fix has been published for CVE-2019-9955 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-2019-9955 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-9955 exists.
Public exploit code: 1 Exploit-DB entry and 1 Nuclei template.
Sources
Also known as GHSA-9r2m-gm27-q4jp.