CVE-2019-12887
LinOTP replay vulnerability with auto resynchronization enabled for TOTP token
KeyIdentity LinOTP before 2.10.5.3 has Incorrect Access Control (issue 1 of 2).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
KeyIdentity LinOTP before 2.10.5.3 has Incorrect Access Control (issue 1 of 2).
- Record
CVE-2019-12887- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-294
- Updated
- 2026-11-02
CVE List No score
KeyIdentity LinOTP before 2.10.5.3 has Incorrect Access Control (issue 1 of 2).
- Record
CVE-2019-12887- Updated
- 2026-11-02
EUVDEUVD-2019-0076 No score
KeyIdentity LinOTP before 2.10.5.3 has Incorrect Access Control (issue 1 of 2).
- Record
EUVD-2019-0076- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rqg8-xjp2-pg9w
LinOTP replay vulnerability with auto resynchronization enabled for TOTP token
LinOTP is prone to a replay attack with activated automatic resynchronization. This vulnerability may allow an attacker to successfully log in with OTP values recorded at a previous point in time.
This attack is only possible if automatic resynchronization is enabled for the TOTP token type. The automatic resynchronization is deactivated by default. All other tokens are unaffected.
- Record
GHSA-rqg8-xjp2-pg9w- CVSS 4.0
- 9.2 Critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-294
- Updated
- 2026-11-02
OSV
KeyIdentity LinOTP before 2.10.5.3 has Incorrect Access Control (issue 1 of 2).
- Record
CVE-2019-12887- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-rqg8-xjp2-pg9w
LinOTP replay vulnerability with auto resynchronization enabled for TOTP token
LinOTP is prone to a replay attack with activated automatic resynchronization. This vulnerability may allow an attacker to successfully log in with OTP values recorded at a previous point in time.
This attack is only possible if automatic resynchronization is enabled for the TOTP token type. The automatic resynchronization is deactivated by default. All other tokens are unaffected.
- Record
GHSA-rqg8-xjp2-pg9w- CVSS 4.0
- 9.2 Critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-294
- Updated
- 2026-11-02
OSVPYSEC-2019-103 No score
KeyIdentity LinOTP before 2.10.5.3 has Incorrect Access Control (issue 1 of 2).
- Record
PYSEC-2019-103- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
linotpPyPI |
before 2.11.1 | 2.11.1 |
linotpPyPI |
before 2.11.1, plus listed versions 2.102.10.0.12.72.7.0.22.7.1 Show 23 moreShow less2.7.1.12.7.1.22.7.22.7.2.12.7.2.22.82.8.0.12.8.0.22.8.0.32.8.12.8.1.22.8.1.32.8.1.72.92.9.0.32.9.0.42.9.0.52.9.12.9.1.42.9.32.9.3.12.9.3.22.9.3.3 |
2.11.1 |
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-2019-12887 is a high vulnerability (CVSS 8.1) in Keyidentity Linotp, published June 27, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.17%, the 67th percentile. Fixed in linotp 2.11.1.
References
linotp.org/CVE-2019-12887.txt
nvd.nist.gov/vuln/detail/CVE-2019-12887
github.com/LinOTP/LinOTP/commit/6d28d93af59d2ce0d844a6a3282148064efc6ad8
linotp.org/linotp-hotfix-autoresync.html