CVE-2018-1000162
Cross-site Scripting in Parsedown
Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in setMarkupEscaped for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in setMarkupEscaped for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.
- Record
CVE-2018-1000162- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in setMarkupEscaped for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.
- Record
CVE-2018-1000162- Updated
- 2026-11-02
EUVDEUVD-2022-1520 No score
Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in setMarkupEscaped for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.
- Record
EUVD-2022-1520- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qgpv-86r3-87fh
Cross-site Scripting in Parsedown
Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in setMarkupEscaped for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.
- Record
GHSA-qgpv-86r3-87fh- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in setMarkupEscaped for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.
- Record
CVE-2018-1000162- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-qgpv-86r3-87fh
Cross-site Scripting in Parsedown
Parsedown version prior to 1.7.0 contains a Cross Site Scripting (XSS) vulnerability in setMarkupEscaped for escaping HTML that can result in JavaScript code execution. This attack appears to be exploitable via specially crafted markdown that allows it to side step HTML escaping by breaking AST boundaries. This vulnerability appears to have been fixed in 1.7.0 and later.
- Record
GHSA-qgpv-86r3-87fh- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVCLSA-2026-1790249242 No score
TuxCare security update for erusev/parsedown (1 CVE)
TuxCare rebuilt erusev/parsedown to address 1 CVE. Fixed in 1.6.4-p1+tuxcare.
- Record
CLSA-2026-1790249242- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
erusev/parsedownPackagist |
before 1.7.0 | 1.7.0 |
erusev/parsedownTuxCare:Packagist |
1.6.4 up to 1.6.4-p1+tuxcare | 1.6.4-p1+tuxcare |
erusev/parsedownPackagist |
before 1.7.0, plus listed versions 0.1.00.1.10.1.20.1.30.1.4 Show 45 moreShow less0.1.50.2.00.2.10.3.00.4.00.4.10.4.20.4.30.4.40.4.50.4.60.4.70.4.80.5.00.6.00.7.00.7.10.7.20.7.30.7.40.7.50.7.60.7.70.8.00.8.10.8.20.8.30.9.00.9.10.9.20.9.30.9.41.0.01.0.0-rc.11.0.0-rc.21.0.0-rc.31.0.0-rc.41.0.0-rc.51.0.11.1.01.1.11.1.21.1.31.1.41.2.0 |
1.7.0 |
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-2018-1000162 is a medium vulnerability (CVSS 6.1) in Parsedown, published April 18, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.16%, the 67th percentile. Fixed in erusev/parsedown 1.7.0.
References
Left out here: 17 versions. The JSON record has them.