CVE-2021-25761
MEDIUMCVSS 5.3/10EPSS 0.54%
Last modified
CVE-2021-25761 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. In JetBrains Ktor before 1.5.0, a birthday attack on SessionStorage key was possible.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.
Description
In JetBrains Ktor before 1.5.0, a birthday attack on SessionStorage key was possible.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jetbrains | Ktor | < 1.5.0 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-25761?
In JetBrains Ktor before 1.5.0, a birthday attack on SessionStorage key was possible.
How severe is CVE-2021-25761?
CVE-2021-25761 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.
How do I fix CVE-2021-25761?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-25755In JetBrains Code With Me before 2020.3, an attacker on the …2.5
- CVE-2021-25756In JetBrains IntelliJ IDEA before 2020.2, HTTP links were us…5.3
- CVE-2021-25757In JetBrains Hub before 2020.1.12629, an open redirect was p…6.1
- CVE-2021-25758In JetBrains IntelliJ IDEA before 2020.3, potentially insecu…7.8
- CVE-2021-25759In JetBrains Hub before 2020.1.12629, an authenticated user …6.5
- CVE-2021-25760In JetBrains Hub before 2020.1.12669, information disclosure…5.3
- CVE-2021-25762In JetBrains Ktor before 1.4.3, HTTP Request Smuggling was p…5.3
- CVE-2021-25763In JetBrains Ktor before 1.4.2, weak cipher suites were enab…5.3
- CVE-2021-25764In JetBrains PhpStorm before 2020.3, source code could be ad…5.3
- CVE-2021-25765In JetBrains YouTrack before 2020.4.4701, CSRF via attachmen…8.8
- CVE-2021-25766In JetBrains YouTrack before 2020.4.4701, improper resource …5.3
- CVE-2021-25767In JetBrains YouTrack before 2020.6.1767, an issue's existen…5.3
Are you affected by CVE-2021-25761?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST