CVE-2015-5956

What it is

The sanitizeLocalUrl function in TYPO3 6.x before 6.2.15, 7.x before 7.4.0, 4.5.40, and earlier allows remote authenticated users to bypass the XSS filter and conduct cross-site scripting (XSS) attacks via a base64 encoded data URI, as demonstrated by the (1) returnUrl parameter to show_rechis.php and the (2) redirect_url parameter to index.php.

At a glance

Exploitability

Can be exploited over the network with a login. Limited direct impact.

Exploit odds

2.0% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2015-09-16 14:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:30 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.0% in the next 30 days (EPSS).
• Severity: 3.5 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2015-09-16 14:59 UTC

Last modified

2026-06-17 00:30 UTC

Exploit probability

2.0% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Modified

Affected

• typo3 ≤ 4.5.40
• typo3 6.0
• typo3 6.0.1
• typo3 6.0.2
• typo3 6.0.3
• typo3 6.0.4
• typo3 6.0.5
• typo3 6.0.6

Attack profile CVSS 2.0 · 3.5

Attack vector

Network

Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

Is it in your code?

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