ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy
Published Jun 22, 2017
7.5
HIGHCVSS 3.0
EPSS 4.04%
Description
ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy. Successfully guessing the token can lead to remote code execution.
Affected products
-
- Version Versions before 2.11.8 and 3.5.5StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| EllisLab | ExpressionEngine | n/a |
|
- 2.0.0
- 2.0.1
- 2.0.2
- 2.1.0
- 2.1.1
- 2.1.2
- 2.1.3
- 2.1.4
- 2.1.5
- 2.2.0
- 2.2.1
- 2.2.2
- 2.3.0
- 2.3.1
- 2.4.0
- 2.5.0
- 2.5.1
- 2.5.2
- 2.5.3
- 2.5.4
- 2.5.5
- 2.6.0
- 2.6.1
- 2.7.0
- 2.7.1
- 2.7.2
- 2.7.3
- 2.8.0
- 2.8.1
- 2.9.0
- 2.9.1
- 2.9.2
- 2.9.3
- 2.10.0
- 2.10.1
- 2.10.2
- 2.10.3
- 2.11.0
- 2.11.1
- 2.11.2
- 2.11.3
- 2.11.4
- 2.11.5
- 2.11.6
- 2.11.7
- 3.0.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.1.0
- 3.1.1
- 3.1.2
- 3.1.3
- 3.1.4
- 3.2.0
- 3.2.1
- 3.3.0
- 3.3.1
- 3.3.2
- 3.3.3
- 3.3.4
- 3.4.0
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 3.4.5
- 3.4.6
- 3.4.7
- 3.5.0
- 3.5.1
- 3.5.2
- 3.5.3
- 3.5.4
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:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
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 v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.04% (0.04042) | 90.30th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.04% (0.04042) | 89.26th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.75% (0.00751) | 71.44th | v4 (v2025.03.14) |
| Jul 20, 2024 | 2.40% (0.02402) | 90.04th | v3 (v2023.03.01) |
| Jun 2, 2023 | 2.40% (0.02402) | 88.33th | v3 (v2023.03.01) |
| May 2, 2023 | 2.44% (0.02441) | 88.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.73% (0.01732) | 85.91th | v3 (v2023.03.01) |
| Mar 6, 2023 | 5.79% (0.05785) | 90.41th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.79% (0.05785) | 89.45th | v2 (v2022.01.01) |
| Mar 19, 2022 | 5.79% (0.05785) | 77.72th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.63% (0.05634) | 76.84th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.73% (0.02725) | 55.43th | v1 |
| Jan 6, 2022 | 2.73% (0.02725) | 54.99th | v1 |
| Sep 1, 2021 | 2.73% (0.02725) | 79.44th | v1 |
| Apr 14, 2021 | 2.73% (0.02725) | 0.00th | v1 |
References (5)
- http://www.securityfocus.com/bid/99242 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5 x_refsource_CONFIRMVendor Advisory
- https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8 x_refsource_CONFIRMVendor Advisory
- https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released x_refsource_CONFIRMVendor Advisory
- https://hackerone.com/reports/215890 x_refsource_MISCPermissions Required
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/99242 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://docs.expressionengine.com/latest/about/changelog.html#version-3-5-5 | x_refsource_CONFIRMVendor Advisory | |
| https://docs.expressionengine.com/v2/about/changelog.html#version-2-11-8 | x_refsource_CONFIRMVendor Advisory | |
| https://expressionengine.com/blog/expressionengine-3.5.5-and-2.11.8-released | x_refsource_CONFIRMVendor Advisory | |
| https://hackerone.com/reports/215890 | x_refsource_MISCPermissions Required |
Change history (0)
No recorded changes yet.