Cross-site scripting in Zyxel GS1900 Series Switches
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-35030 |
| CWE-ID | CWE-79 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
GS1900-8 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-8HP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-10HP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-16 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24E Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24EP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24HP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-24HPv2 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-48 Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-48HP Hardware solutions / Routers & switches, VoIP, GSM, etc GS1900-48HPv2 Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | ZyXEL Communications Corp. |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Cross-site scripting
EUVDB-ID: #VU55434
Risk: Low
CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-35030
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the CGI program. A remote authenticated attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
MitigationInstall update from vendor's website.
Vulnerable software versionsGS1900-8: 2.60
GS1900-8HP: 2.60
GS1900-10HP: 2.60
GS1900-16: 2.60
GS1900-24E: 2.60
GS1900-24EP: 2.60
GS1900-24: 2.60
GS1900-24HP: 2.60
GS1900-24HPv2: 2.60
GS1900-48: 2.60
GS1900-48HP: 2.60
GS1900-48HPv2: 2.60
CPE2.3- cpe:2.3:h:zyxel_communications_corp:gs1900-8:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-8hp:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-10hp:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-16:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-24e:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-24ep:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-24:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-24hp:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-24hpv2:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-48:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-48hp:2.60:*:*:*:*:*:*:*
- cpe:2.3:h:zyxel_communications_corp:gs1900-48hpv2:2.60:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
