CVE-2021-39189
Observable Response Discrepancy in Lost Password Service
Pimcore is an open source data & experience management platform. In versions prior to 10.1.3, it is possible to enumerate usernames via the forgot password functionality. This issue is fixed in version 10.1.3. As a workaround, one may apply the available patch manually.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Observable Response Discrepancy in Lost Password Service
Pimcore is an open source data & experience management platform. In versions prior to 10.1.3, it is possible to enumerate usernames via the forgot password functionality. This issue is fixed in version 10.1.3. As a workaround, one may apply the available patch manually.
- Record
CVE-2021-39189- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-204
- Updated
- 2026-11-02
EUVDEUVD-2021-1981
Pimcore is an open source data & experience management platform. In versions prior to 10.1.3, it is possible to enumerate usernames via the forgot password functionality. This issue is fixed in version 10.1.3. As a workaround, one may apply the available patch manually.
- Record
EUVD-2021-1981- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-579x-cjvr-cqj9
Observable Response Discrepancy in Lost Password Service
Impact
It is possible to enumerate usernames via the forgot password functionality
Patches
Update to version 10.1.3 or apply this patch manually: https://github.com/pimcore/pimcore/pull/10223.patch
Workarounds
Apply https://github.com/pimcore/pimcore/pull/10223.patch manually.
- Record
GHSA-579x-cjvr-cqj9- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-203, CWE-204
- Updated
- 2026-11-02
NVD
Pimcore is an open source data & experience management platform. In versions prior to 10.1.3, it is possible to enumerate usernames via the forgot password functionality. This issue is fixed in version 10.1.3. As a workaround, one may apply the available patch manually.
- Record
CVE-2021-39189- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-204, CWE-203
- Updated
- 2026-11-02
OSV
Pimcore is an open source data & experience management platform. In versions prior to 10.1.3, it is possible to enumerate usernames via the forgot password functionality. This issue is fixed in version 10.1.3. As a workaround, one may apply the available patch manually.
- Record
CVE-2021-39189- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-579x-cjvr-cqj9
Observable Response Discrepancy in Lost Password Service
Impact
It is possible to enumerate usernames via the forgot password functionality
Patches
Update to version 10.1.3 or apply this patch manually: https://github.com/pimcore/pimcore/pull/10223.patch
Workarounds
Apply https://github.com/pimcore/pimcore/pull/10223.patch manually.
- Record
GHSA-579x-cjvr-cqj9- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-203, CWE-204
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pimcore/pimcorePackagist | before 10.1.3 | 10.1.3 |
pimcore/pimcorePackagist | before 10.1.3, plus listed versions 10.0.82.2.02.2.12.2.22.3.0 Show 45 moreShow less3.0.03.0.13.0.23.0.33.0.43.0.53.0.63.1.03.1.14.0.04.0.14.1.04.1.14.1.24.1.34.2.04.3.04.3.14.4.04.4.14.4.24.4.34.5.04.6.04.6.14.6.24.6.34.6.44.6.5v10.0.0v10.0.0-BETA1v10.0.0-BETA2v10.0.0-BETA3v10.0.0-BETA4v10.0.1v10.0.2v10.0.3v10.0.4v10.0.5v10.0.6v10.0.7v10.0.9v10.1.0v10.1.1v10.1.2 | 10.1.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-39189 is a medium vulnerability (CVSS 5.3) in Pimcore, published September 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.37%, the 72nd percentile. Fixed in pimcore/pimcore 10.1.3.
References
github.com/pimcore/pimcore/security/advisories/GHSA-579x-cjvr-cqj9
huntr.dev/bounties/12462a99-ebf8-4e39-80b3-54a16caa3f4c
nvd.nist.gov/vuln/detail/CVE-2021-39189
Left out here: 111 versions. The JSON record has them.