CVE-2020-10539
CVE-2020-10539 is a critical-severity vulnerability in Epikur 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-287.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (70th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-287
- Affected product: Epikur
- Published:
- Last modified:
Description
An issue was discovered in Epikur before 20.1.1. The Epikur server contains the checkPasswort() function that, upon user login, checks the submitted password against the user password's MD5 hash stored in the database. It is also compared to a second MD5 hash, which is the same for every user (aka a "Backdoor Password" of 3p1kursupport). If the submitted password matches either one, access is granted.
Frequently asked questions
- What is CVE-2020-10539?
- An issue was discovered in Epikur before 20.1.1. The Epikur server contains the checkPasswort() function that, upon user login, checks the submitted password against the user password's MD5 hash stored in the database. It is also compared to a second MD5 hash, which is the same for every user (aka a "Backdoor Password" of 3p1kursupport). If the submitted password matches either one, access is granted.
- How severe is CVE-2020-10539?
- CVE-2020-10539 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-2020-10539 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-10539?
- CVE-2020-10539 affects Epikur. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-10539?
- 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-2020-10539 published?
- CVE-2020-10539 was published on 2021-02-05 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:epikur:epikur:*:*:*:*:*:*:*:*
More vulnerabilities in Epikur
- CVE-2020-10537 — High (CVSS 7.8): An issue was discovered in Epikur before 20.1.1. A Glassfish 4.1 server with a default configuration is running on TCP…
- CVE-2020-10538 — Medium (CVSS 5.5): An issue was discovered in Epikur before 20.1.1. It stores the secret passwords of the users as MD5 hashes in the…
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