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GHSA-7733-hjv6-4h47

MediumCVSS 4.7 / 10
Published Oct 8, 2020·Last modified Mar 13, 2026
Affected Components(0)

No affected components available

Description

Meta

  • CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C(5.0)
  • CWE-79

:information_source:  This vulnerability has been fixed in May 2019 already, CVE and GHSA were assigned later in October 2020

Problem

It has been discovered that the Fluid Engine (package typo3fluid/fluid) is vulnerable to cross-site scripting when making use of the ternary conditional operator in templates like the following.

{showFullName ? fullName : defaultValue}

Solution

Update to versions 2.0.5, 2.1.4, 2.2.1, 2.3.5, 2.4.1, 2.5.5 or 2.6.1 of this typo3fluid/fluid package that fix the problem described.

Updated versions of this package are bundled in following TYPO3 (typo3/cms-core) releases:

  • TYPO3 v8.7.25 (using typo3fluid/fluid v2.5.5)
  • TYPO3 v9.5.6 (using typo3fluid/fluid v2.6.1)

Credits

Thanks to Bill Dagou who reported this issue and to TYPO3 core merger Claus Due who fixed the issue.

References

Risk Scores
Base Score
4.7

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.

Threat Intelligence
4.3

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.97%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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Medium severity
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