CVE-2019-9955
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.
- Exploit odds
- 21.2% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 21.2% in the next 30 days (EPSS).
- Severity: 6.1 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 21.2% · EPSS, next 30 days
- Weakness
- CWE-79 · Cross-site scripting
- Record status
- Modified
Affected
- Zyxel atp200 Firmware 4.31
- Zyxel atp500 Firmware 4.31
- Zyxel atp800 Firmware 4.31
- Zyxel usg20-vpn Firmware 4.31
- Zyxel usg20w-vpn Firmware 4.31
- Zyxel usg40 Firmware 4.31
- Zyxel usg40w Firmware 4.31
- Zyxel usg60 Firmware 4.31
Attack profile CVSS 3.0 · 6.1
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Raw vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-9955.md and follow it. Check whether this project is affected by CVE-2019-9955. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page
- https://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtml
- https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page
- https://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtml
References
- http://packetstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.html
- http://seclists.org/fulldisclosure/2019/Apr/22
- https://www.exploit-db.com/exploits/46706/
- https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page
- https://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtml
- http://packetstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.html
- http://seclists.org/fulldisclosure/2019/Apr/22
- https://www.exploit-db.com/exploits/46706/
- https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page
- https://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtml