CVE-2021-46387
ZyXEL ZyWALL 2 Plus Internet Security Appliance is affected by Cross Site Scripting (XSS).
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 21.0%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
ZyXEL ZyWALL 2 Plus Internet Security Appliance is affected by Cross Site Scripting (XSS). Insecure URI handling leads to bypass security restriction to achieve Cross Site Scripting, which allows an attacker able to execute arbitrary JavaScript codes to perform multiple attacks such as clipboard hijacking and session hijacking.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 20.95% probability · 98th percentile
- Public exploits
- 1 in Exploit-DB · first 2 March 2022
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- zyxel/zywall 2 plus internet security appliance firmware
- Source
- cve@mitre.org
EPSS 21.0% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/166189/Zyxel-ZyWALL-2-Plus-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
- https://drive.google.com/drive/folders/1_XfWBLqxT2Mqt7uB663Sjlc62pE8-rcN?usp=sharingExploit, Third Party Advisory
- https://www.zyxel.com/uk/en/products_services/zywall_2_plus.shtmlBroken Link, Vendor Advisory
- https://www.zyxel.com/us/en/support/security_advisories.shtmlVendor Advisory
- http://packetstormsecurity.com/files/166189/Zyxel-ZyWALL-2-Plus-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
- https://drive.google.com/drive/folders/1_XfWBLqxT2Mqt7uB663Sjlc62pE8-rcN?usp=sharingExploit, Third Party Advisory
- https://www.zyxel.com/uk/en/products_services/zywall_2_plus.shtmlBroken Link, Vendor Advisory
- https://www.zyxel.com/us/en/support/security_advisories.shtmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.