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filesharing stored XSS in bundle description markdown links

CVE-2026-129430

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

5.1MediumCNA
Exploited
No known exploitation
Fix
Fixed in 2.14.3
Who is exposed
Not reported

Do first: Upgrade to a fixed version: 2.14.3.

Published
Last modified
Reference
Last checked
8/100 · provisional
None on Exploit-DB, Metasploit or GitHub

Summary

Axeloz Filesharing before the fixed release contains a stored cross-site scripting flaw in bundle descriptions. An attacker who has a low-privilege account can reach it over the network, and it needs a victim to open the public bundle preview page, where the script runs and can steal the owner's token to act on their bundles.

Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.

Original description

Axeloz Filesharing before 2.14.3 contains a stored cross-site scripting vulnerability that allows authenticated users to inject script by storing raw HTML or javascript: Markdown links in bundle descriptions. Recipients viewing the public bundle preview page execute the script via Alpine x-html, letting attackers steal the owner_token from localStorage and issue owner-scoped requests against victim bundles.

cve.now Index

8Pcve.now Index 8 of 100 · methodology v3 · provisional
  • Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
  • Exposure3/25Reachable over the network · Unknown: No advisory context yet
  • Reach?/20Unknown. No tracked technology or package matched
  • Severity5.1/10CVSS 5.1
  • No patch0/5No signal

What would change the score

  • Would score about 63 if added to CISA KEV
  • Would score about 58 if CISA's SSVC rates exploitation active
  • Would score about 27 if advisories confirm default setups are exposed

What to do

  • Upgrade to a fixed version: 2.14.3.

Check your systems with an agent

Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.

Check whether my systems are affected by CVE-2026-129430 (axeloz filesharing before 2.14.3 Stored XSS via Bundle Description Markdown Links), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-129430 (entry last updated 2026-11-14):
Affected:
- axeloz filesharing: fixed in 2.14.3
Fixed versions: 2.14.3.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-129430 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-129430 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/axeloz/filesharing/commit/eebc80a77c0e3fe3b8467245ba89fa49f2d35928
- https://github.com/axeloz/filesharing/commit/366ee452aba636858d55b82068ecc35f6d08b6d6
- https://github.com/axeloz/filesharing/pull/90
- https://github.com/axeloz/filesharing/blob/e865be1f09f8eb5a46c4b9a16635de892b093d8f/app/Http/Resources/BundleResource.php#L33
- https://github.com/axeloz/filesharing/releases/tag/2.14.3
- https://github.com/axeloz/filesharing
- https://www.vulncheck.com/advisories/axeloz-filesharing-before-2.14.3-stored-xss-via-bundle-description-markdown-links
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-129430
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-129430"}.

Timeline

  1. CVE published
  2. First seen by cve.now

Affected versions

  • axeloz filesharing

    fixed in 2.14.3

Evidence 9

CVE record · 2

Establishes: The identifier and description.

  1. Record
  2. Record

Other links · 7

  1. Patch
  2. Patch
  3. Patch
  4. Repository
  5. Repository
  6. Repository
  7. Link

Corrections

None so far.

Something wrong on this page? Report an error. Every fix is listed here.

Questions about CVE-2026-129430

Is CVE-2026-129430 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data

Which versions are affected by CVE-2026-129430?

filesharing: before 2.14.3.Source: cve.now feed data

How do I fix CVE-2026-129430?

Upgrade to a fixed version: 2.14.3.Source: cve.now feed data