CVE-2019-20512: Open edX Ironwood.1 allows support/certificates?course_id= reflected XSS.

Routine

MEDIUM 6.1DOWNGRADE

CVE-2019-20512 is a medium-severity flaw (CVSS 6.1) affecting ironwood. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Open edX Ironwood.1 allows support/certificates?course_id= reflected XSS.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-03-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: open.edx

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

Am I affected?

Timeline

2020-03-18 19:15 UTCPublished CVE record published
2026-06-17 02:30 UTCUpdated Record last modified

open.edx ironwood DOWNGRADE

Affected: .1

Fixed in: no fixed release known

Safe to downgrade to: a release before .1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before .1 (Debian / Ubuntu)

apt-cache madison ironwood sudo apt install ironwood=<VERSION_BEFORE_.1> sudo apt-mark hold ironwood

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ironwood sudo dnf downgrade ironwood-<VERSION_BEFORE_.1> sudo dnf versionlock add ironwood

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2019-20512?

ironwood: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-20512 being exploited?

CVE-2019-20512 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-2019-20512 affect?

CVE-2019-20512 affects ironwood. Severity is medium (CVSS 6.1). Open edX Ironwood.1 allows support/certificates?course_id= reflected XSS.

How urgent is CVE-2019-20512?

Priority 35/100. Public exploit reference

References

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