CVE-2015-8766 Symphony CMS XSS Vulnerabilities

What is CVE-2015-8766?

CVE-2015-8766 is a medium-severity cross-site scripting vulnerability in n/a, published on 8 Jan 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Multiple cross-site scripting (XSS) vulnerabilities in content/content.systempreferences.php in Symphony CMS before 2.6.4 allow remote attackers to inject arbitrary web script or HTML via the (1) email_sendmail[from_name], (2) email_sendmail[from_address], (3) email_smtp[from_name], (4) email_smtp[from_address], (5) email_smtp[host], (6) email_smtp[port], (7) jit_image_manipulation[trusted_external_sites], or (8) maintenance_mode[ip_whitelist] parameters to system/preferences.

Weakness: CWE-79

Which versions are affected by CVE-2015-8766?

2 open source packages ship an affected version, including symphonycms/symphony-2. It affects 1 product.

Products include Getsymphony Symphony.

How do I fix CVE-2015-8766?

Upgrade symphonycms/symphony-2 to 2.6.4 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2015-8766 being exploited?

There is no known exploitation of CVE-2015-8766 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2020-25912 XML external entity in n/a Critical 9.1
• CVE-2017-7694 Code injection in n/a High 8.8
• CVE-2016-4309 Auth bypass in n/a High 7.5
• CVE-2010-3458 SQL injection in n/a High 7.5
• CVE-2010-2143 Path traversal in n/a High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4c5w-qqfg-grf3.