CVE-2021-46876 json
/user/sessions endpoint allows detecting valid accounts
published 2021-03-11 5 y ago modified 2026-06-17 4 mo ago also GHSA-gmrf-99gw-vvwj , EUVD-2023-0942
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist ezsystems/ezpublish-kernel 6.13.8.1, 7.5.15.1
- ibexa ez_platform_kernel 6.13.8.1, 7.5.15.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | ezsystems/ezpublish-kernel | >=6.13.0, <6.13.8.1 >=7.5.0, <7.5.15.1 |
6.13.8.1 7.5.15.1 |
Classification
- Weakness
-
- CWE-203 Observable Discrepancy
References
-
github.com
/ezsystems/ezpublish-kernel/commit/b496f073c3f03707d3531a6941dc098b84e3cbed
web, patch
-
github.com
/ezsystems/ezpublish-kernel/security/advisories/GHSA-gmrf-99gw-vvwj
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-46876
advisory
-
github.com
/ezsystems/ezpublish-kernel
package
-
packagist.org
/packages/ezsystems/ezpublish-kernel
web
Sources
- CVE List CVE-2021-46876
- GitHub Advisory GHSA-gmrf-99gw-vvwj
- NVD CVE-2021-46876
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