PrestaShop cross-site scripting via customer contact form in FO, through file upload

CVE-2024-34716 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

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.

Basic information

Type
reviewed
Severity
critical
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2024-05-14 20:17:12 UTC
Updated
2024-05-14 20:17:13 UTC
GitHub reviewed
2024-05-14 20:17:12 UTC
NVD published
2024-05-14

EPSS Score

Score Percentile
36.66% 96.95%

CVSS Scores

Base score Version Severity Vector
9.7 3.1 —
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type Value
GHSA GHSA-45vm-3j38-7p78 ↗
CVE CVE-2024-34716 ↗

CWEs

CWE id Name
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Credits

  • matthieu-rolland (remediation_developer)
  • aelmokhtar (reporter)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
composer prestashop/prestashop >= 8.1.0, < 8.1.6 8.1.6 —

References

cvelogic Threat Intelligence