Cross-Site Scripting in ternary conditional operator
> ### 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 * [TYPO3-CORE-SA-2019-013](https://typo3.org/security/advisory/typo3-core-sa-2019-013)
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-15241US | medium6.1 | — | ||
TYPO3 Fluid Engine (package `typo3fluid/fluid`) before versions 2.0.5, 2.1.4, 2.2.1, 2.3.5, 2.4.1, 2.5.5 or 2.6.1 is vulnerable to cross-site scripting when making use of the terna… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-15241.yamlWEB
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-15241.yamlWEB
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3fluid/fluid/CVE-2020-15241.yamlWEB
- https://github.com/TYPO3/FluidPACKAGE
- https://github.com/TYPO3/Fluid/commit/9ef6a8ffff2e812025fc0701b4ce72eea6911a3dWEB
- https://github.com/TYPO3/Fluid/security/advisories/GHSA-7733-hjv6-4h47WEB
- https://nvd.nist.gov/vuln/detail/CVE-2020-15241ADVISORY
- https://typo3.org/security/advisory/typo3-core-sa-2019-013WEB
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