Stored XSS in OpenEMR Eye Exam form answers
CVE-2026-33348 is a stored cross-site scripting vulnerability in OpenEMR versions prior to 8.0.0.3. The flaw affects the functionality that displays answers submitted through Eye Exam forms in patient encounters. Users with the Notes - my encounters role can fill these forms, and the submitted answers are later rendered on the encounter page and in visit history views. Due to insufficient neutralization of untrusted input before it is displayed, an authenticated attacker with that role can store malicious JavaScript payloads in form answers. When another user with the same role views the affected encounter page or visit history, the injected script executes in that user's browser context.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Notes - my encounters role to only fully trusted users. Monitor Eye Exam form submissions and encounter history content for suspicious script payloads, and consider applying temporary output encoding or sanitization controls in the affected rendering path if operationally feasible. Because exploitation requires stored malicious content to be viewed, reducing exposure of the affected pages and reviewing existing stored form data may reduce risk until patching is completed.Remediation
Patch, then assume compromise.
v8_0_0_3 and associated with commit f488efbe3eb7f17d0f057f960020cb611149f8a2.Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.