CVE-2025-55203 Plane Stored XSS in Add Work Item Functionality
Attackers can inject malicious scripts into work item descriptions, leading to session hijacking or data theft when other users view the content.
- 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
- None listed
What is CVE-2025-55203?
CVE-2025-55203 is a medium-severity cross-site scripting vulnerability in makeplane plane, published on 15 Aug 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Plane is open-source project management software. Prior to version 0.28.0, a stored cross-site scripting (XSS) vulnerability exists in the description_html field of Plane. This flaw allows an attacker to inject malicious JavaScript code that is stored and later executed in other users’ browsers. The description_html field is not properly sanitized or escaped. An attacker can submit crafted JavaScript payloads that are saved in the application’s database. When another user views the affected content, the injected code executes in their browser, running in the application’s context and bypassing standard security protections. Successful exploitation can lead to session hijacking, theft of sensitive information, or forced redirection to malicious sites. The vulnerability can also be chained with CSRF attacks to perform unauthorized actions, or leveraged to distribute malware and exploit additional browser vulnerabilities. This issue has been patched in version 0.28.0.
Weakness: CWE-79
Which versions are affected by CVE-2025-55203?
How do I fix CVE-2025-55203?
No fix has been published for CVE-2025-55203 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-55203 being exploited?
There is no known exploitation of CVE-2025-55203 in the wild and no public exploit code.
Sources
Also known as GHSA-rwjc-xhh3-m9m9.