# CVE-2023-48240: XWiki Platform sends cookies to external images in rendered diff and is vulnerable to server side request forgery > Attackers can steal session cookies and access protected content via server-side request forgery in XWiki's rendered diff feature. - **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 20 Nov 2023 - **Updated:** 2 Aug 2024 - **Also known as:** GHSA-7rfg-6273-f5wp ## What is CVE-2023-48240? CVE-2023-48240 is a critical server-side request forgery vulnerability in Xwiki Xwiki, published on 20 Nov 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link. ### Official description XWiki Platform is a generic wiki platform. The rendered diff in XWiki embeds images to be able to compare the contents and not display a difference for an actually unchanged image. For this, XWiki requests all embedded images on the server side. These requests are also sent for images from other domains and include all cookies that were sent in the original request to ensure that images with restricted view right can be compared. Starting in version 11.10.1 and prior to versions 14.10.15, 15.5.1, and 15.6, this allows an attacker to steal login and session cookies that allow impersonating the current user who views the diff. The attack can be triggered with an image that references the rendered diff, thus making it easy to trigger. Apart from stealing login cookies, this also allows server-side request forgery (the result of any successful request is returned in the image's source) and viewing protected content as once a resource is cached, it is returned for all users. As only successful requests are cached, the cache will be filled by the first user who is allowed to access the resource. This has been patched in XWiki 14.10.15, 15.5.1 and 15.6. The rendered diff now only downloads images from trusted domains. Further, cookies are only sent when the image's domain is the same the requested domain. The cache has been changed to be specific for each user. As a workaround, the image embedding feature can be disabled by deleting `xwiki-platform-diff-xml-.jar` in `WEB-INF/lib/`. Weakness: CWE-918 (Server-Side Request Forgery), CWE-281 (Improper Preservation of Permissions), CWE-201 (Insertion of Sensitive Information Into Sent Data) ## Which versions are affected by CVE-2023-48240? 6 open source packages ship an affected version, including org.xwiki.platform:xwiki-platform-diff-xml. It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `org.xwiki.platform:xwiki-platform-diff-xml` | Maven | From 11.10.1 | 14.10.15 | | `org.xwiki.platform:xwiki-platform-diff-xml` | Maven | From 11.10.1 | 14.10.15 | | `org.xwiki.platform:xwiki-platform-diff-xml` | Maven | From 15.0-rc-1 | 15.5.1 | | `org.xwiki.platform:xwiki-platform-diff-xml` | Maven | From 15.0-rc-1 | 15.5.1 | | `org.xwiki.platform:xwiki-platform-diff-xml` | Maven | From 15.6-rc-1 | 15.6 | | `org.xwiki.platform:xwiki-platform-diff-xml` | Maven | From 15.6-rc-1 | 15.6 | Products: Xwiki Xwiki. ## How do I fix CVE-2023-48240? Upgrade org.xwiki.platform:xwiki-platform-diff-xml to a fixed version for your release line: 14.10.15, 15.5.1 or 15.6. ## Is CVE-2023-48240 being exploited? There is no known exploitation of CVE-2023-48240 in the wild and no public exploit code. ## Other vulnerabilities in Xwiki Xwiki - [CVE-2025-24893](https://insights.sbomify.com/CVE-2025-24893/): XWiki Platform Eval Injection (critical 9.8, exploited in the wild) - [CVE-2025-53836](https://insights.sbomify.com/CVE-2025-53836/): XWiki Rendering is vulnerable to RCE attacks when processing nested macros (critical 10.0) - [CVE-2024-55662](https://insights.sbomify.com/CVE-2024-55662/): XWiki allows remote code execution through the extension sheet (critical 10.0) - [CVE-2024-55877](https://insights.sbomify.com/CVE-2024-55877/): XWiki allows remote code execution from account through macro descriptions and XWiki.XWikiSyntaxMacrosList (critical 10.0) - [CVE-2024-37901](https://insights.sbomify.com/CVE-2024-37901/): XWiki Platform vulnerable to remote code execution from account via SearchSuggestConfigSheet (critical 10.0) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2023-48240 and fix it if it is affected. What it is: CVE-2023-48240 is a critical server-side request forgery vulnerability in Xwiki Xwiki, published on 20 Nov 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2023-48240 in the wild and no public exploit code. Affected packages and fixed versions: - org.xwiki.platform:xwiki-platform-diff-xml (Maven): affected from 11.10.1; fixed in 14.10.15 - org.xwiki.platform:xwiki-platform-diff-xml (Maven): affected from 11.10.1; fixed in 14.10.15 - org.xwiki.platform:xwiki-platform-diff-xml (Maven): affected from 15.0-rc-1; fixed in 15.5.1 - org.xwiki.platform:xwiki-platform-diff-xml (Maven): affected from 15.0-rc-1; fixed in 15.5.1 - org.xwiki.platform:xwiki-platform-diff-xml (Maven): affected from 15.6-rc-1; fixed in 15.6 - org.xwiki.platform:xwiki-platform-diff-xml (Maven): affected from 15.6-rc-1; fixed in 15.6 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2023-48240/ (Markdown: https://insights.sbomify.com/CVE-2023-48240/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2023-48240 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-48240 - OSV: https://osv.dev/vulnerability/CVE-2023-48240 --- From sbomify Insights: https://insights.sbomify.com/CVE-2023-48240/ Summaries are generated and may contain mistakes; the official description above is the record.