CVE-2020-28938: OpenClinic version 0.8.2 is affected by a stored XSS vulnerability in lib/Check.php that allows users of the a

Routine

MEDIUM 5.4DOWNGRADE

CVE-2020-28938 is a medium-severity flaw (CVSS 5.4) affecting openclinic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenClinic version 0.8.2 is affected by a stored XSS vulnerability in lib/Check.php that allows users of the application to force actions on behalf of other users.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-12-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: openclinic project

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

Am I affected?

Timeline

2020-12-03 16:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

openclinic project openclinic DOWNGRADE

Affected: 0.8.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.8.2 (Debian / Ubuntu)

apt-cache madison openclinic sudo apt install openclinic=<VERSION_BEFORE_0.8.2> sudo apt-mark hold openclinic

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

dnf --showduplicates list openclinic sudo dnf downgrade openclinic-<VERSION_BEFORE_0.8.2> sudo dnf versionlock add openclinic

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-2020-28938?

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

Is CVE-2020-28938 being exploited?

CVE-2020-28938 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-2020-28938 affect?

CVE-2020-28938 affects openclinic. Severity is medium (CVSS 5.4). OpenClinic version 0.8.2 is affected by a stored XSS vulnerability in lib/Check.php that allows users of the application to force actions on behalf of other users.

How urgent is CVE-2020-28938?

Priority 35/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-28939 HIGH 7.2 DOWNGRADE OpenClinic version 0.8.2 is affected by a medical/test_new.php insecure file upload vulnerability
CVE-2020-28937 HIGH 7.5 DOWNGRADE OpenClinic version 0.8.2 is affected by a missing authentication vulnerability that allows unauthenticated use
CVE-2020-20444 HIGH 7.2 DOWNGRADE Jact OpenClinic 0.8.20160412 allows the attacker to read server files after login to the the admin account by

References

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