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CVE-2024-40626

Getoutline Outline cross-site scripting (XSS)

7.3 HIGHPublic exploitEPSS 0.52%
  1. Published16 Jul 2024

Description

Outline is an open source, collaborative document editor. A type confusion issue was found in ProseMirror’s rendering process that leads to a Stored Cross-Site Scripting (XSS) vulnerability in Outline. An authenticated user can create a document containing a malicious JavaScript payload. When other users view this document, the malicious Javascript can execute in the origin of Outline. Outline includes CSP rules to prevent third-party code execution, however in the case of self-hosting and having your file storage on the same domain as Outline a malicious payload can be uploaded as a file attachment and bypass those CSP restrictions. This issue has been addressed in release version 0.77.3. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Affected products

Getoutline Outline< 0.77.3

Remediation

Fixed in
Getoutline Outline≥ 0.77.3

References

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Frequently asked

Is CVE-2024-40626 being actively exploited?

CVE-2024-40626 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.52%.

How severe is CVE-2024-40626?

CVE-2024-40626 has a CVSS 3.1 base score of 7.3, rated high. EPSS estimates a 0.52% probability of exploitation.

Which products are affected by CVE-2024-40626?

Affected products include Getoutline Outline.

How do I fix CVE-2024-40626?

Upgrade affected software to a fixed version, for example Getoutline Outline 0.77.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-40626 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.