CVE-2020-26768
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
formstonenpm | < 1.4.17 | 1.4.17 |
Affected products
2- Formstone/Formstonedescription
Patches
Vulnerability mechanics
Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
4- github.com/advisories/GHSA-wc29-h54q-q8qxghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-26768ghsaADVISORY
- github.com/Formstone/Formstone/commit/b067f31f5f6a0acd3ade4fd6dccae6e3633caa02ghsaWEB
- github.com/Formstone/Formstone/issues/286ghsax_refsource_MISCWEB
News mentions
0No linked articles in our index yet.