Medium

formwork Cross-site scripting vulnerability in Markdown fields

  • Disclosed: 28.05.2024
  • Updated: 11.10.2026 10:22

Impact

Users with access to the administration panel with page editing permissions could insert <script> tags in markdown fields, which are exposed on the publicly accessible site pages, leading to potential XSS injections.

Patches

  • Formwork 1.13.0 has been released with a patch that solves this vulnerability. Now the system config option content.safe_mode (enabled by default) controls whether HTML tags and potentially dangerous links are escaped. This is configurable as in some cases more flexibility should be given. Panel users should be only a controlled group of editors, which cannot enable the option by themselves, and not a generic group. This mitigates the chance of introducing vulnerabilities.
  • Formwork 2.x (6adc302) adds a similar content.safeMode system option. Like Formwork 1.13.0, by default HTML tags and dangerous link are escaped. Even if enabled by an administrator, however, <script> and other dangerous tags are still converted to text, but secure tags are allowed.

References

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-35621

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package getformwork/formwork < 1.13.0 1.13.0

References

CVSS score 4.8/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-79
Platform
Composer
Package
getformwork/formwork
Disclosed
28.05.2024
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-gx8m-f3mp-fg99 - CC BY 4.0

Vulnerability history: getformwork/formwork

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
7
First → latest
02.2023 02.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 2
  • Medium 5

Disclosures per year

  1. 2023: 1
  2. 2024: 2
  3. 2025: 3
  4. 2026: 1
  1. High · 8.8 CVE-2026-27198 >= 2.0.0, < 2.3.4 2.3.4
  2. High · 8.2 ghsa-c85w-x26q-ch87 >= 2.0.0-beta.1, < 2.0.0-beta.4 2.0.0-beta.4
  3. Medium · 4.7 ghsa-vf6x-59hh-332f >= 2.0.0-beta.3, < 2.0.0-beta.4 2.0.0-beta.4
  4. Medium · 4.8 CVE-2024-37160 < 1.13.1, >= 2.0.0-beta.1, < 2.0.0-beta.2 1.13.1, 2.0.0-beta.2
  5. formwork Cross-site scripting vulnerability in Markdown fields this entry
    Medium · 4.8 CVE-2024-35621 < 1.13.0 1.13.0
  6. Medium · 4.8 CVE-2023-24230 < 1.13.0 1.13.0

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