CVE-2023-33255: An issue was discovered in Papaya Viewer 1.0.1449

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MEDIUM 6.1DOWNGRADE

CVE-2023-33255 is a medium-severity flaw (CVSS 6.1) affecting papaya viewer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Papaya Viewer 1.0.1449. User-supplied input in form of DICOM or NIFTI images can be loaded into the Papaya web application without any kind of sanitization. This allows injection of arbitrary JavaScript code into image metadata, which is executed when that metadata is displayed in the Papaya web application.

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	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-05-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: uthscsa

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

Am I affected?

Timeline

2023-05-26 20:15 UTCPublished CVE record published
2026-06-17 06:01 UTCUpdated Record last modified

uthscsa papaya viewer DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy papaya-viewer || rpm -q papaya-viewer || papaya-viewer --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison papaya-viewer sudo apt install papaya-viewer=<VERSION_BEFORE_1.0> sudo apt-mark hold papaya-viewer

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

dnf --showduplicates list papaya-viewer sudo dnf downgrade papaya-viewer-<VERSION_BEFORE_1.0> sudo dnf versionlock add papaya-viewer

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-2023-33255?

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

Is CVE-2023-33255 being exploited?

CVE-2023-33255 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-2023-33255 affect?

CVE-2023-33255 affects papaya viewer. Severity is medium (CVSS 6.1). An issue was discovered in Papaya Viewer 1.0.1449. User-supplied input in form of DICOM or NIFTI images can be loaded into the Papaya web application without any kind of sanitization. This allows injection of arbitrary JavaScript code into

How urgent is CVE-2023-33255?

Priority 41/100. Public exploit reference

References

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