What is CVE-2013-1751?

CVE-2013-1751 is a critical-severity vulnerability in Twiki, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-11-07.

How severe is CVE-2013-1751?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in Twiki

CVE-2013-1751

TWiki before 5.1.4 allows remote attackers to execute arbitrary shell commands by sending a crafted '%MAKETEXT{}%' parameter value containing Perl backtick characters.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2019-11-07 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.049 (91.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.049 · newest: 0.049 · change: 0.000

Affected products

Twiki

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security-tracker.debian.org/tracker/CVE-2013-1751 (Third Party Advisory)
www.securitytracker.com/id/1028149 (VDB Entry, Third Party Advisory)
twiki.org/cgi-bin/view/Codev/SecurityAlert-CVE-2013-1751 (Patch, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2013-1751?: CVE-2013-1751 is a critical-severity vulnerability in Twiki, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-11-07.
How severe is CVE-2013-1751?: Critical severity. CVSS v3 base score is 9.8 out of 10.