CVE-2025-6278
critical
CVSS v3
9.8
CVSS v4 NEW
2.0
VIR risk
9.8
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.
Predictions
Exploit likelihood
97%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | upsonic | <0.56.0 | 0.56.0 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| upsonic | upsonic | {"endIncluding":"0.55.6"} | |
References
- https://github.com/Upsonic/Upsonic/issues/356
- https://vuldb.com/?ctiid.313282
- https://vuldb.com/?id.313282
- https://vuldb.com/?submit.593096
- https://nvd.nist.gov/vuln/detail/CVE-2025-6278
- https://github.com/Upsonic/Upsonic/pull/360
- https://github.com/Upsonic/Upsonic/commit/a54529acc6e4bfe28f4f5c80c058144348a306b7
- https://github.com/Upsonic/Upsonic
- https://github.com/Upsonic/Upsonic/blob/v0.55.6/src/upsonic/server/markdown/server/server.py#L39
- https://github.com/pypa/advisory-database/tree/main/vulns/upsonic/PYSEC-2025-67.yaml
CWEs
CWE-22
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.