CVE-2020-24916
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
- Record
CVE-2020-24916- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-78
- Updated
- 2026-11-02
CVE List No score
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
- Record
CVE-2020-24916- Updated
- 2026-11-02
EUVDEUVD-2020-17621 No score
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
- Record
EUVD-2020-17621- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-962f-382j-8f7x
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
- Record
GHSA-962f-382j-8f7x- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
OSV
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
- Record
CVE-2020-24916- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-24916
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
- Record
DEBIAN-CVE-2020-24916- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-24916
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
- Record
UBUNTU-CVE-2020-24916- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-04
OSVUSN-4569-1 No score
yaws vulnerabilities
It was discovered that Yaws did not properly sanitize XML input. A remote attacker could use this vulnerability to execute an XML External Entity (XXE) injection attack. (CVE-2020-24379)
It was discovered that Yaws mishandled certain input when running CGI scripts. A remote attacker could use this vulnerability to execute arbitrary commands. (CVE-2020-24916)
- Record
USN-4569-1- Updated
- 2026-11-02
OSVUSN-8995-1 No score
yaws vulnerabilities
It was discovered that Yaws did not properly sanitize XML input in its WebDAV implementation. A remote attacker could possibly use this issue to perform XML external entity injection attacks. (CVE-2020-24379)
It was discovered that Yaws mishandled certain input when running CGI scripts. A remote attacker could possibly use this issue to execute arbitrary commands. (CVE-2020-24916)
- Record
USN-8995-1- Updated
- 2026-11-04
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
yawsDebian:12 |
before 2.0.8+dfsg-1 | 2.0.8+dfsg-1 |
yawsDebian:13 |
before 2.0.8+dfsg-1 | 2.0.8+dfsg-1 |
yawsDebian:14 |
before 2.0.8+dfsg-1 | 2.0.8+dfsg-1 |
yawsDebian:9 From an advisory covering 2 CVEs |
before 2.0.4+dfsg-1+deb9u1, plus listed versions 2.0.4+dfsg-1 |
2.0.4+dfsg-1+deb9u1 |
yawsDebian:10 From an advisory covering 2 CVEs |
before 2.0.6+dfsg-1+deb10u1, plus listed versions 2.0.6+dfsg-1 |
2.0.6+dfsg-1+deb10u1 |
yawsUbuntu:Pro:16.04:LTS |
before 2.0.2-1ubuntu0.1~esm1, plus listed versions 1.98-51.99-11.99-22.0.2-1 |
2.0.2-1ubuntu0.1~esm1 |
yawsUbuntu:18.04:LTS |
before 2.0.4+dfsg-2ubuntu0.1, plus listed versions 2.0.4+dfsg-2 |
2.0.4+dfsg-2ubuntu0.1 |
yawsUbuntu:Pro:20.04:LTS |
before 2.0.7+dfsg-1ubuntu0.1~esm1, plus listed versions 2.0.6+dfsg-12.0.6+dfsg-32.0.7+dfsg-1 |
2.0.7+dfsg-1ubuntu0.1~esm1 |
yawsUbuntu:18.04:LTS From an advisory covering 2 CVEs |
before 2.0.4+dfsg-2ubuntu0.1, plus listed versions 2.0.4+dfsg-2 |
2.0.4+dfsg-2ubuntu0.1 |
yawsUbuntu:Pro:16.04:LTS From an advisory covering 2 CVEs |
before 2.0.2-1ubuntu0.1~esm1, plus listed versions 1.98-51.99-11.99-22.0.2-1 |
2.0.2-1ubuntu0.1~esm1 |
yawsUbuntu:Pro:20.04:LTS From an advisory covering 2 CVEs |
before 2.0.7+dfsg-1ubuntu0.1~esm1, plus listed versions 2.0.6+dfsg-12.0.6+dfsg-32.0.7+dfsg-1 |
2.0.7+dfsg-1ubuntu0.1~esm1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| affected, aliases, references | OSV | |
| affected, facts | OSV | |
| 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-2020-24916 is a critical vulnerability (CVSS 9.8) in Yaws, published September 9, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 17.4%, the 97th percentile. Fixed in yaws 2.0.8+dfsg-1.
References
github.com/erlyaws/yaws/commits/master
packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection.html
vuln.be/post/yaws-xxe-and-shell-injections
lists.debian.org/debian-lts-announce/2020/09/msg00022.html
usn.ubuntu.com/4569-1
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debian.org/security/2020/dsa-4773
nvd.nist.gov/vuln/detail/CVE-2020-24916
security-tracker.debian.org/tracker/CVE-2020-24916
ubuntu.com/security/CVE-2020-24916
cve.org/CVERecord?id=CVE-2020-24916