What is CVE-2013-4103?

CVE-2013-4103 is a critical-severity vulnerability in Cryptocat Project, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-11-04.

How severe is CVE-2013-4103?

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

Improper input validation in Cryptocat Project

CVE-2013-4103

Cryptocat before 2.0.22 has Remote Script Injection due to improperly sanitizing user input

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

Published 2019-11-04 · 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: 0.069 (93.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.069 · newest: 0.069 · change: 0.000

Affected products

Cryptocat Project

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

packetstormsecurity.com/files/134252/Cryptocat-Script-Insertion.html (VDB Entry, Third Party Advisory)
www.openwall.com/lists/oss-security/2013/07/10/15 (Mailing List, Third Party Advisory)
tobtu.com/decryptocat.php (Product)
packetstormsecurity.com/files/cve/CVE-2013-4103 (VDB Entry, Third Party Advisory)
www.securityfocus.com/bid/61093 (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2013-4103?: CVE-2013-4103 is a critical-severity vulnerability in Cryptocat Project, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-11-04.
How severe is CVE-2013-4103?: Critical severity. CVSS v3 base score is 9.8 out of 10.