PrestaShop cross-site scripting via customer contact form in FO, through file upload
Impact
Only PrestaShops with customer-thread feature flag enabled are impacted, starting from PrestaShop 8.1.0.
The impact is substantial, when the customer thread feature flag is enabled, through the front-office contact form, a hacker can upload a malicious file containing an XSS that will be executed when an admin opens the attached file in back office.
Consequence: the script injected can access the session and the security token, which allows it to perform any authenticated action in the scope of the administrator's right.
Patches
This vulnerability is patched in 8.1.6.
Workarounds
As long as you have not upgraded to 8.1.6, a simple workaround is to disable the customer-thread feature-flag.
Thank you to Ayoub AIT ELMOKHTAR, who discovered this vulnerability and share it with the PrestaShop team.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | prestashop/prestashop | >= 8.1.0, < 8.1.6 | 8.1.6 |
| PrestaShop (core) | prestashop/prestashop | >= 8.1.0, < 8.1.6 | 8.1.6 |
References
- https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-45vm-3j38-7p78
- https://nvd.nist.gov/vuln/detail/CVE-2024-34716
- https://github.com/PrestaShop/PrestaShop/commit/a248898655e56cbcc6c308a5f1c8752231624bae
- https://github.com/PrestaShop/PrestaShop
- https://github.com/PrestaShop/PrestaShop/releases/tag/8.1.6
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-79- Platform
- Composer, PrestaShop
- Package
prestashop/prestashop- Disclosed
- 14.05.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-45vm-3j38-7p78 - CC BY 4.0
Vulnerability history: prestashop/prestashop
All published vulnerabilities of this package (PrestaShop (core)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 32
- First → latest
- 01.2020 05.2026
- Without a fix
- 9
- Exploited in attacks
- 1
Severity breakdown
- Critical 6
- High 8
- Medium 17
- Low 1
Disclosures per year
- 2020: 1
- 2021: 1
- 2022: 10
- 2023: 10
- 2024: 5
- 2025: 1
- 2026: 4
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PrestaShop cross-site scripting via customer contact form in FO, through file upload this entry
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