CVE-2021-43852
In affected versions by sending a specially crafted request, an attacker could inject properties into existing JavaScript language construct prototypes, such as objects.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.09%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
OroPlatform is a PHP Business Application Platform. In affected versions by sending a specially crafted request, an attacker could inject properties into existing JavaScript language construct prototypes, such as objects. Later this injection may lead to JS code execution by libraries that are vulnerable to Prototype Pollution. This issue has been patched in version 4.2.8. Users unable to upgrade may configure a firewall to drop requests containing next strings: `__proto__` , `constructor[prototype]`, and `constructor.prototype` to mitigate this issue.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.09% probability · 65th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-74, CWE-1321
- Affected
- oroinc/oroplatform
- Source
- security-advisories@github.com
EPSS 1.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/oroinc/platform/commit/62c26936b3adee9c20255dcd9f8ee5c299b464a9Patch, Third Party Advisory
- https://github.com/oroinc/platform/security/advisories/GHSA-jx5q-g37m-h5hjMitigation, Third Party Advisory
- https://github.com/oroinc/platform/commit/62c26936b3adee9c20255dcd9f8ee5c299b464a9Patch, Third Party Advisory
- https://github.com/oroinc/platform/security/advisories/GHSA-jx5q-g37m-h5hjMitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.