Formstone <=1.4.16 is vulnerable to a Reflected Cross-Site Scripting (XSS) vulnerability…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Formstone <=1.4.16 is vulnerable to a Reflected Cross-Site Scripting (XSS) vulnerability caused by improper validation of user supplied input in the upload-target.php and upload-chunked.php files. A remote attacker could exploit this vulnerability using a specially crafted URL to execute a script in a victim's Web browser within the security context of the hosting Web site once the URL is clicked or visited. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials, force malware execution, user redirection and others.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | formstone (npm) | before 1.4.17 | 1.4.17 | Patch available | GHSA-wc29-h54q-q8qx |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- formstone (npm) Vendor— Affected before 1.4.17 Fixed in 1.4.17 Patch available GHSA-wc29-h54q-q8qx
Remediation
- Fix · GHSA-wc29-h54q-q8qx formstone (npm) Fixed in 1.4.17 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26768
- 2026-10-03 Alias added: GHSA-wc29-h54q-q8qx
References
Sources
- CVE-2020-26768 · CVE Program
- CVE-2020-26768 · NVD
- FIRST EPSS
- GHSA-wc29-h54q-q8qx · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences