What’s Vulnerable › Vulnerabilities

CVE-2024-21627: Some attribute not escaped in Validate::isCleanHTML method

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-02 · updated 2026-06-17
• Weakness: CWE-20

Description

PrestaShop is an open-source e-commerce platform. Prior to versions 8.1.3 and 1.7.8.11, some event attributes are not detected by the `isCleanHTML` method. Some modules using the `isCleanHTML` method could be vulnerable to cross-site scripting. Versions 8.1.3 and 1.7.8.11 contain a patch for this issue. The best workaround is to use the `HTMLPurifier` library to sanitize html input coming from users. The library is already available as a dependency in the PrestaShop project. Beware though that in legacy object models, fields of `HTML` type will call `isCleanHTML`.

Affected products

• PrestaShop: before 1.7.8.11; from 8.0.0 before 8.1.3 — fixed in 1.7.8.11, 8.1.3

How to fix

Upgrade to a fixed version: PrestaShop 1.7.8.11, 8.1.3. Check the vendor advisory for mitigations.

References

• https://github.com/PrestaShop/PrestaShop/commit/73cfb44666818eefd501b526a894fe884dd12129
• https://github.com/PrestaShop/PrestaShop/commit/ba06d18466df5b92cb841d504cc7210121104883
• https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-xgpm-q3mq-46rq
• https://github.com/PrestaShop/PrestaShop/commit/73cfb44666818eefd501b526a894fe884dd12129
• https://github.com/PrestaShop/PrestaShop/commit/ba06d18466df5b92cb841d504cc7210121104883
• https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-xgpm-q3mq-46rq

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