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Fencer Intel
low 3.5

CVE-2015-5956 json

TYPO3 cross-site scripting (XSS)

published 11y ago modified 4mo ago also GHSA-989h-wv8x-933p , EUVD-2022-3322

cvss
3.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

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.

Patch / fix

  • packagist typo3/cms 6.2.15, 7.4.0

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Exploit prediction

2.01% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected packages

ecosystem package affected fixed in
packagist typo3/cms
>=6.0, <6.2.15
>=7.0, <7.4.0
>=4.0, <=4.5.40
6.2.15
7.4.0

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.