No exploitation reportedFix available

CVE-2020-24553

Q: Is CVE-2020-24553 actively exploited?

Active exploitation of CVE-2020-24553 has not been confirmed. Its EPSS score was 3.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-24553?

CVE-2020-24553 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

No exploitation reported by the sources we read.

Published2020-09-02
Fixed in1.15.1 · 1.14.8
WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Go before 1.14.8 and 1.15.x before 1.15.1 allows XSS because text/html is the default for CGI/FCGI handlers that lack a Content-Type header.

Timeline

dates in UTC

2020-09-0217:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-24553?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-24553?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Branch	Affected	Fixed in	Source
1.15	≥ 1.15.0, < 1.15.1	1.15.1	NVD
1.14	< 1.14.8	1.14.8	NVD · OSV

Opensuse leap

Branch	Affected	Fixed in	Source
15.1	= 15.1	no fix published	NVD
15.2	= 15.2	no fix published	NVD

Fedoraproject fedora

Branch	Affected	Fixed in	Source
33.x	= 33	no fix published	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2020-24553 Red Hat Product Security51 products fixed · 60 known affected
golang: default Content-Type setting in net/http/cgi and net/http/fcgi could cause XSS
cli as a component of OpenShift Serverless · golang-bin as a component of Red Hat Ceph Storage 2 · golang-src as a component of Red Hat Ceph Storage 2 · +57 more
RHSA-2021:0146 Red Hat Product Security26 products fixed
Red Hat Security Advisory: Release of OpenShift Serverless 1.12.0
RHSA-2021:0145 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat OpenShift Serverless Client kn 1.12.0
RHSA-2020:5493 Red Hat Product Security23 products fixed
Red Hat Security Advisory: go-toolset:rhel8 security update

Full record on NVD

Fix

Update Go to 1.15.1 · 1.14.8
Vendor fix Red Hat Product Security RHSA-2021:0146 · 26 productsSee the documentation at: https://access.redhat.com/documentation/en-us/openshift_container_platform/4.6/html/serverless_applications/index
Vendor fix Red Hat Product Security RHSA-2020:5493 · 23 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
No fix available, says the vendor Red Hat Product Security CVE-2020-24553 · 9 productsFix deferred
No fix available, says the vendor Red Hat Product Security CVE-2020-24553 · 1 productAffected
No fix planned, says the vendor Red Hat Product Security CVE-2020-24553 · 10 productsOut of support scope
No fix planned, says the vendor Red Hat Product Security CVE-2020-24553 · 40 productsWill not fix

Advisories and patches

www.oracle.comPatch
www.oracle.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.16.1read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
NVDweakness (CWE)CWE-79read 2026-10-23
FIRST EPSSEPSS score3.6 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published: 2020-09-02
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-24553?

Go before 1.14.8 and 1.15.x before 1.15.1 allows XSS because text/html is the default for CGI/FCGI handlers that lack a Content-Type header.

Is CVE-2020-24553 actively exploited?

Active exploitation of CVE-2020-24553 has not been confirmed. Its EPSS score was 3.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-24553?

CVE-2020-24553 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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