CVE-2025-31908
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedCross-Site Request Forgery (CSRF) vulnerability in Sami Ahmed Siddiqui JSON Structuring Markup json-structuring-markup allows Stored XSS.This issue affects JSON Structuring Markup: from n/a through <= 0.1.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceCSRF vulnerability in the json-structuring-markup library allows attackers to craft malicious requests that result in Stored XSS. The vulnerability affects version 0.1 and below, enabling attackers to inject persistent malicious scripts through crafted JSON markup that gets stored and executed when viewed by other users.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify json-structuring-markup library usageSearch your codebase or dependency manifest (package.json, requirements.txt, pom.xml, go.mod) for the json-structuring-markup libraryAffected if The library is present and no version is specified or version is 0.1 or below
-
Verify installed versionRun the appropriate package manager command to list installed versions (npm list, pip show, gem list) and confirm the version of json-structuring-markupAffected if The installed version is 0.1 or any version below 0.1
-
Check for CSRF protection on JSON endpointsInspect your application's form handling or API endpoints that process JSON markup for the presence of anti-CSRF tokens or same-site cookie configurationsAffected if JSON markup endpoints lack anti-CSRF tokens or same-site cookie attributes
-
Examine JSON input validationReview the code that handles user-supplied JSON markup to determine if input validation and sanitization are applied before storageAffected if User-supplied JSON markup is stored without validation or sanitization allowing script injection
-
Confirm storage mechanism presenceCheck if the application stores JSON markup in a database, file system, or session that persists across requests and is rendered to other usersAffected if JSON markup is stored and rendered to other users without output encoding
You are affected if the json-structuring-markup library version 0.1 or below is in use AND your application stores user-supplied JSON markup without CSRF protection and input sanitization.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement anti-CSRF tokens and same-site cookie attributes to prevent cross-site request forgery attacks. Validate and sanitize all user-supplied JSON input to prevent XSS injection at the application level.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,664.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-31908 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-31908 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data