HIGH
Zendesk Samlr before 2.6.2 allows an XML nodes comment attack such as a name_id node with user@example.com followed by <!---->
Published Jul 26, 2019
7.5
HIGHCVSS 3.0
EPSS 1.21%
Description
Zendesk Samlr before 2.6.2 allows an XML nodes comment attack such as a name_id node with user@example.com followed by <!---->. and then the attacker's domain name.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.21% 0.01205
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.01205
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.21% (0.01205) | 67.24th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.21% (0.01205) | 66.91th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.08% (0.00084) | 36.22th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.08% (0.00084) | 35.96th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00084) | 33.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.42% (0.00416) | 10.04th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
Weaknesses (1)
References (5)
- https://github.com/advisories/GHSA-qpxp-5j56-gg3x Advisory
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/samlr/CVE-2018-20857.yml
- https://github.com/zendesk/samlr/compare/v2.6.1...v2.6.2 x_refsource_MISCPatchThird Party Advisory
- https://github.com/zendesk/samlr/pull/29
- https://nvd.nist.gov/vuln/detail/CVE-2018-20857
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-qpxp-5j56-gg3x | Advisory | |
| https://github.com/rubysec/ruby-advisory-db/blob/master/gems/samlr/CVE-2018-20857.yml | ||
| https://github.com/zendesk/samlr/compare/v2.6.1...v2.6.2 | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/zendesk/samlr/pull/29 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2018-20857 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jul 26, 2019
Updated Aug 5, 2024
Reserved Jul 26, 2019
Link CVE-2018-20857
CISA Vulnrichment
GHSA-QPXP-5J56-GG3X Updated n/a