Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 4 |
CVE-ID | CVE-2021-35208 CVE-2021-34807 CVE-2021-35207 CVE-2021-35209 |
CWE-ID | CWE-79 CWE-601 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Zimbra Collaboration Web applications / Webmail solutions |
Vendor | Synacor Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
EUVDB-ID: #VU55394
Risk: Low
CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-35208
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 ZmMailMsgView.js in the Calendar Invite component. A remote authenticated attacker can inject 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 updates from vendor's website.
Vulnerable software versionsZimbra Collaboration: 8.8.0 - 8.8.15 Patch 22
External linkshttp://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23
http://wiki.zimbra.com/wiki/Security_Center
http://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU55397
Risk: Medium
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-34807
CWE-ID:
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data in the /preauth Servlet. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
MitigationInstall updates from vendor's website.
Vulnerable software versionsZimbra Collaboration: 8.8.0 - 9.0.0 Patch 15
External linkshttp://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23
http://wiki.zimbra.com/wiki/Security_Center
http://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU55396
Risk: Low
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-35207
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 login component. A remote 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 updates from vendor's website.
Vulnerable software versionsZimbra Collaboration: 8.8.0 - 9.0.0 Patch 15
External linkshttp://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23
http://wiki.zimbra.com/wiki/Security_Center
http://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU55395
Risk: Medium
CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-35209
CWE-ID:
CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data in ProxyServlet.java in the /proxy servlet. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
MitigationInstall updates from vendor's website.
Vulnerable software versionsZimbra Collaboration: 8.8.0 - 9.0.0 Patch 15
External linkshttp://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23
http://wiki.zimbra.com/wiki/Security_Center
http://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.