Multiple vulnerabilities in Joomla!
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2020-13761 CVE-2020-13763 CVE-2020-13762 CVE-2020-13760 |
| CWE-ID | CWE-79 CWE-16 CWE-352 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Joomla! Web applications / CMS |
| Vendor | Joomla! |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
Updated: 19.10.2020
Assigned CVE-IDs for vulnerabilities #1-4.
1) Cross-site scripting
EUVDB-ID: #VU28529
Risk: Low
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-13761
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 heading tag option in the "Articles – Newsflash" and "Articles - Categories" modules. A remote authenticated user 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 versionsJoomla!: 3.0.0 - 3.9.18
External linkshttp://developer.joomla.org/security-centre/813-20200601-core-xss-in-modules-heading-tag-option.html
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.
2) Insecure default configuration
EUVDB-ID: #VU28530
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-13763
CWE-ID:
CWE-16 - Configuration
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform XSS attack.
The vulnerability exists due to the default settings of the global "textfilter" configuration doesn't block HTML inputs for 'Guest' users. A remote user can inject and execute arbitrary HTML code in victim's browser in context of the website.
Install updates from vendor's website.
Vulnerable software versionsJoomla!: 2.5.0 - 3.9.18
External linksQ & 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.
3) Cross-site scripting
EUVDB-ID: #VU28531
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-2020-13762
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 module tag option in com_modules. 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 versionsJoomla!: 3.0.0 - 3.9.18
External linkshttp://developer.joomla.org/security-centre/815-20200603-core-xss-in-com-modules-tag-options.html
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.
4) Cross-site request forgery
EUVDB-ID: #VU28532
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-2020-13760
CWE-ID:
CWE-352 - Cross-Site Request Forgery (CSRF)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform cross-site request forgery attacks.
The vulnerability exists due to insufficient validation of the HTTP request origin in com_postinstall component. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.
MitigationInstall updates from vendor's website.
Vulnerable software versionsJoomla!: 3.7.0 - 3.9.18
External linkshttp://developer.joomla.org/security-centre/817-20200605-core-csrf-in-com-postinstall.html
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.
