How severe is CVE-2013-4103?

CVE-2013-4103 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2013-4103 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4103?

CVE-2013-4103 affects Cryptocat Project Cryptocat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-4103?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2013-4103 published?

CVE-2013-4103 was published on 2019-11-04 and last updated on 2026-06-16.

CVE-2013-4103

CVE-2013-4103 is a critical-severity vulnerability in Cryptocat Project Cryptocat with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cryptocat Project Cryptocat
Published: 2019-11-04
Last modified: 2026-06-16

Description

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

Frequently asked questions

What is CVE-2013-4103?: Cryptocat before 2.0.22 has Remote Script Injection due to improperly sanitizing user input
How severe is CVE-2013-4103?: CVE-2013-4103 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2013-4103 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4103?: CVE-2013-4103 affects Cryptocat Project Cryptocat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-4103?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2013-4103 published?: CVE-2013-4103 was published on 2019-11-04 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:cryptocat_project:cryptocat:*:*:*:*:*:*:*:*

More vulnerabilities in Cryptocat Project Cryptocat

CVE-2013-4108 — Critical (CVSS 9.8): Multiple unspecified vulnerabilities in Cryptocat Project Cryptocat 2.0.18 have unknown impact and attack vectors.
CVE-2013-2260 — Critical (CVSS 9.8): Cryptocat before 2.0.22: Cryptocat.random() Function Array Key has Entropy Weakness
CVE-2013-2259 — Critical (CVSS 9.8): Cryptocat before 2.0.22 has Arbitrary Code Execution on Firefox Conversation Overview
CVE-2013-4102 — Critical (CVSS 9.1): Cryptocat before 2.0.22 strophe.js Math.random() Random Number Generator Weakness
CVE-2013-4105 — High (CVSS 7.5): Cryptocat before 2.0.22 has Multiparty Encryption Scheme Information Disclosure
CVE-2013-2257 — High (CVSS 7.5): Cryptocat before 2.0.42 has Group Chat ECC Private Key Generation Brute Force Weakness

All CVEs affecting Cryptocat Project Cryptocat →

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