CVE-2021-21494
MEDIUMCVSS 4.8/10EPSS 0.51%
Last modified
CVE-2021-21494 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. MK-AUTH through 19.01 K4.9 allows XSS via the admin/logs_ajax.php tipo parameter. An attacker can leverage this to read the centralmka2 (session token) cookie, which is not set to HTTPOnly.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.
Description
MK-AUTH through 19.01 K4.9 allows XSS via the admin/logs_ajax.php tipo parameter. An attacker can leverage this to read the centralmka2 (session token) cookie, which is not set to HTTPOnly.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mk-Auth | Mk-Auth | <= 19.01 |
References
- http://mk-auth.com.br/Vendor Advisory
- https://gist.github.com/alacerda/380b8923e36a29a02ba1457c1eb3ec2fExploit, Third Party Advisory
- http://mk-auth.com.br/Vendor Advisory
- https://gist.github.com/alacerda/380b8923e36a29a02ba1457c1eb3ec2fExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-21494?
MK-AUTH through 19.01 K4.9 allows XSS via the admin/logs_ajax.php tipo parameter. An attacker can leverage this to read the centralmka2 (session token) cookie, which is not set to HTTPOnly.
How severe is CVE-2021-21494?
CVE-2021-21494 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21494?
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.
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Are you affected by CVE-2021-21494?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST