PHP forms generated using the PHP FormMail Generator are vulnerable to stored cross-site scripting

Published 8 y ago 2018-07-13 · modified 4 mo ago 2026-06-17 · JSON

CVSS

6.1

v3.0 · NVD

CISA KEV

not known exploited

EPSS

1.5%

percentile 75%

Public exploits

none known

The code generated by PHP FormMail Generator prior to 17 December 2016 is vulnerable to stored cross-site scripting. In the generated form.lib.php file, upload file types are checked against a hard-coded list of dangerous extensions. This list does not include all variations of PHP files, which may lead to execution of the contained PHP code if the attacker can guess the uploaded filename. The form by default appends a short random string to the end of the filename.

Exploit prediction (EPSS)

1.51% probability of exploitation in the next 30 days, higher than 75% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	6.1	`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`
NVD	2.0	4.3	`AV:N/AC:M/Au:N/C:N/I:P/A:N`

Affected products

PHP FormMail Generator

Classification

Weakness

CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page
CWE-79 Improper Neutralization of Input During Web Page Generation

References

securityfocus.com /bid/96718 · vdb-entry, x_refsource_BID, x_transferred
kb.cert.org /vuls/id/608591 · third-party-advisory, x_refsource_CERT-VN, x_transferred

Sources

CVE List: CVE-2016-9493
NVD: CVE-2016-9493

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.