CVE-2022-25849
Cross-site Scripting (XSS)
The package joyqi/hyper-down from 0.0.0 are vulnerable to Cross-site Scripting (XSS) because the module of parse markdown does not filter the href attribute very well.
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
CVE List Score used
Cross-site Scripting (XSS)
The package joyqi/hyper-down from 0.0.0 are vulnerable to Cross-site Scripting (XSS) because the module of parse markdown does not filter the href attribute very well.
- Record
CVE-2022-25849- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2022-7018
The package joyqi/hyper-down from 0.0.0 are vulnerable to Cross-site Scripting (XSS) because the module of parse markdown does not filter the href attribute very well.
- Record
EUVD-2022-7018- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4r9g-w48q-8jwm
HyperDown vulnerable to Cross-site Scripting
HyperDown is a markdown parser written for the Chinese website SegmentFault. Improper validation of the href attribute allows for Cross-site Scripting. At publication there are no patched versions, and no known workarounds.
- Record
GHSA-4r9g-w48q-8jwm- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
The package joyqi/hyper-down from 0.0.0 are vulnerable to Cross-site Scripting (XSS) because the module of parse markdown does not filter the href attribute very well.
- Record
CVE-2022-25849- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVGHSA-4r9g-w48q-8jwm
HyperDown vulnerable to Cross-site Scripting
HyperDown is a markdown parser written for the Chinese website SegmentFault. Improper validation of the href attribute allows for Cross-site Scripting. At publication there are no patched versions, and no known workarounds.
- Record
GHSA-4r9g-w48q-8jwm- CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
joyqi/hyper-downPackagist |
through 2.4.27 | None known |
joyqi/hyper-downPackagist |
through 2.4.27, plus listed versions 2.4.102.4.132.4.142.4.152.4.16 Show 10 moreShow less2.4.172.4.182.4.192.4.202.4.212.4.232.4.242.4.252.4.262.4.9 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2022-25849 is a medium vulnerability (CVSS 5.4) in Hyperdown Project Hyperdown, published October 26, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. No source names a fixed version.