A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16
Published Feb 2, 2018
8.1
HIGHCVSS 3.0
EPSS 1.09%
Description
A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.
Affected products
No data.
Configuration 1
- ≤ 1.14.16
Configuration 2
- 7.0
- 8.0
- 9.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.09% (0.01093) | 64.20th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.09% (0.01093) | 63.96th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.24% (0.00242) | 64.69th | v3 (v2023.03.01) |
| Feb 29, 2024 | 0.24% (0.00242) | 63.47th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.24% (0.00242) | 61.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.51% (0.00505) | 72.84th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (7)
- https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-18122.yaml
- https://github.com/advisories/GHSA-j4qf-3w33-8cgc Advisory
- https://github.com/simplesamlphp/simplesamlphp/commit/e2d53086abbb253efb24ddcb49b116246eb0b6ca
- https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-18122
- https://simplesamlphp.org/security/201710-01 x_refsource_CONFIRMPatchVendor Advisory
- https://www.debian.org/security/2018/dsa-4127 vendor-advisoryx_refsource_DEBIANThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-18122.yaml | ||
| https://github.com/advisories/GHSA-j4qf-3w33-8cgc | Advisory | |
| https://github.com/simplesamlphp/simplesamlphp/commit/e2d53086abbb253efb24ddcb49b116246eb0b6ca | ||
| https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-18122 | ||
| https://simplesamlphp.org/security/201710-01 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://www.debian.org/security/2018/dsa-4127 | vendor-advisoryx_refsource_DEBIANThird Party Advisory |
Change history (0)
No recorded changes yet.