CVE-2020-5497: The OpenID Connect reference implementation for MITREid Connect through 1.3.3 allows XSS due to userInfoJson b

Q: How do I fix CVE-2020-5497?

connect: upgrade to newer than 1.3.3. Exact commands for each OS are on this page.

Q: Is CVE-2020-5497 being exploited?

CVE-2020-5497 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-5497 affect?

CVE-2020-5497 affects connect. Severity is medium (CVSS 6.1). The OpenID Connect reference implementation for MITREid Connect through 1.3.3 allows XSS due to userInfoJson being included in the page unsanitized. This is related to header.tag. The issue can be exploited to execute arbitrary JavaScript.

Q: How urgent is CVE-2020-5497?

Priority 47/100. Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2020-5497 is a medium-severity flaw (CVSS 6.1) affecting connect. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The OpenID Connect reference implementation for MITREid Connect through 1.3.3 allows XSS due to userInfoJson being included in the page unsanitized. This is related to header.tag. The issue can be exploited to execute arbitrary JavaScript.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-01-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mitreid

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-01-04 03:15 UTCPublished CVE record published
2026-06-17 03:21 UTCUpdated Record last modified

mitreid connect UPGRADE

Affected: <= 1.3.3

Fixed in: newer than 1.3.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy connect || rpm -q connect || connect --version

2. UPGRADE to newer than 1.3.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade connect

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade connect

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-5497?

connect: upgrade to newer than 1.3.3. Exact commands for each OS are on this page.

Is CVE-2020-5497 being exploited?

CVE-2020-5497 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-5497 affect?

CVE-2020-5497 affects connect. Severity is medium (CVSS 6.1). The OpenID Connect reference implementation for MITREid Connect through 1.3.3 allows XSS due to userInfoJson being included in the page unsanitized. This is related to header.tag. The issue can be exploited to execute arbitrary JavaScript.

How urgent is CVE-2020-5497?

Priority 47/100. Public exploit reference

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References

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