CVE-2020-8439
CVE-2020-8439 is a medium-severity vulnerability in Monstra with a CVSS 3.x base score of 6.5. 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-425.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- CVSS v2: 4.0
- EPSS exploit prediction: 2% (73rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-425
- Affected product: Monstra
- Published:
- Last modified:
Description
Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.
Frequently asked questions
- What is CVE-2020-8439?
- Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.
- How severe is CVE-2020-8439?
- CVE-2020-8439 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2020-8439 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-8439?
- CVE-2020-8439 affects Monstra. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-8439?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-8439 published?
- CVE-2020-8439 was published on 2020-03-07 and last updated on 2026-06-17.
References
- http://uploadboy.me/cn40ne6p89t6/POC.mp4.html
- https://cert.ikiu.ac.ir/public-files/pages/attachments/11/02630f153869936d555a79f89d717f9c.pdf
Affected products (1)
- cpe:2.3:a:monstra:monstra:*:*:*:*:*:*:*:*
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