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    Zero-Day Research/CVE-2019-20366
    ▲ MediumCVSS 6.1✓ PatchedEPSS 0.014%

    Multiple Reflected Cross-Site Scripting in Openfire Product

    An XSS issue was discovered in Ignite Realtime Openfire 4.4.4 via isTrustStore to Manage Store Contents.

    CVE IDCVE-2019-20366
    CVSS v3.16.1 Medium
    VendorOpenfire
    CWECWE-79
    DisclosedDec 31, 2019
    StatusFixed
    All advisories
    • 01Description
    • 02Proof of Concept
    • 03Impact
    • 04Remediation
    • 05Timeline
    • 06References
    01/Description

    What this actually is.

    Technical background, root cause, and affected surface.

    A cross-site scripting (XSS) attack can cause arbitrary code (javascript) to run in a user’s browser while the browser is connected to a trusted web site. The application targets your application’s users and not the application itself, but it uses your application as the vehicle for the attack. XSS payload is executed whenever the user submits the crafted POST request with XSS Payload in Openfire 4.4.4 Product.

    Vendor
    Openfire
    Affected Product
    Ignite Realtime
    CVE
    CVE-2019-20366
    Securin ID
    2019-CSW-12-1036
    Status
    Fixed
    Date
    December 31, 2019
    Severity
    Medium
    CVSS Score
    6.1
    Vector
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    CWE
    CWE-79
    02/Proof of Concept

    From one request
    to root shell.

    Reproduced in a sandboxed environment. Requires only LAN or WiFi adjacency.

    6.1CVSS 3.1
    VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    ScopeChanged
    ImpactC:L / I:L / A:N
    SeverityMedium
    PoC · Exploitation Steps▲ trigger
    01The following vulnerability was tested on Openfire version 4.4.4 Product.02Issue 01: The GET Request “isTrustStore” variable in the URL http://localhost:9090/security-certificate-details.jsp?connectionType=SOCKET_S2S&alias=TEST-103 _rsa&isTrustStore=false are failing to validate XSS payload in client side which results in reflected cross site scripting.03Figure 01: IsTrustStore value is reflected inside a tag parameter between double quotes (here isTrustStore is ‘reflected XSS’).04Figure 02: Add XSS payload to the variable “isTrustStore.”05Figure 03: HTTP Response for the modified “isTrustStore” variable with XSS payload.06Figure 04: Injected XSS payload, “onmouseover=alert(/xss/)// gets reflected in the browser response.
    03/Impact

    What an attacker does to you.

    Post-exploitation outcomes mapped to CVSS impact metrics.

    Medium

    Stealing cookies

    Medium

    End-user files disclosure.

    High

    Redirection of the user to some other page or site.

    04/Remediation

    Fix it. In this order.

    A runbook, not a checklist. Sequence matters — assume compromise before you act.

    Perform context-sensitive encoding of untrusted input before it is echoed back to a browser by using an encoding library. Implement input validation for special characters on all the variables that are reflecting the browser and storing in the database. Implement client-side validation.

    Securin advisory — For coordinated remediation support or threat-actor briefings related to CVE-2019-20366, contact disclose@securin.io
    05/Disclosure Timeline

    Vendors moved in days.
    Attackers in hours.

    Reconstructed from vendor advisories, CISA bulletins, and Securin research records.

    Dec 31, 2019

    Discovered in Openfire product.

    Timeline recorded · Disclosure coordinated by Securin

    06/References

    Cite, verify, go deeper.

    Primary sources — NVD, CISA KEV, and machine-readable IoC feed.

    NVD

    NVD — CVE-2019-20366

    nvd.nist.gov/vuln/detail/CVE-2019-20366 →
    SEC

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