CVE-2025-6278
CVE-2025-6278 is a medium-severity vulnerability in Upsonic with a CVSS 3.x base score of 5.5. 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-22.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- CVSS v2: 5.2
- CVSS v4: 2.0
- EPSS exploit prediction: 1% (47th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-18698
- Weakness: CWE-22
- Affected product: Upsonic
- Published:
- Last modified:
Description
A vulnerability classified as critical was found in Upsonic up to 0.55.6. This vulnerability affects the function os.path.join of the file markdown/server.py. The manipulation of the argument file.filename leads to path traversal. The exploit has been disclosed to the public and may be used.
Frequently asked questions
- What is CVE-2025-6278?
- A vulnerability classified as critical was found in Upsonic up to 0.55.6. This vulnerability affects the function os.path.join of the file markdown/server.py. The manipulation of the argument file.filename leads to path traversal. The exploit has been disclosed to the public and may be used.
- How severe is CVE-2025-6278?
- CVE-2025-6278 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2025-6278 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-6278?
- CVE-2025-6278 affects Upsonic. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-6278?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-6278 have an EU (EUVD) identifier?
- Yes. CVE-2025-6278 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18698.
- When was CVE-2025-6278 published?
- CVE-2025-6278 was published on 2025-06-19 and last updated on 2026-06-17.
References
- https://github.com/Upsonic/Upsonic/issues/356
- https://vuldb.com/?ctiid.313282
- https://vuldb.com/?id.313282
- https://vuldb.com/?submit.593096
Affected products (1)
- cpe:2.3:a:upsonic:upsonic:*:*:*:*:*:*:*:*
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- CVE-2025-6279 — Medium (CVSS 5.5): A vulnerability, which was classified as critical, has been found in Upsonic up to 0.55.6. This issue affects the…
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