Is matrix-synapse affected by CVE-2024-53863?

PyPI matrix-synapse is affected in <1.120.1.

Is CVE-2024-53863 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

high

CVE-2024-53863

Q: Is CVE-2024-53863 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

PyPI · matrix-synapse

Summary

Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decoders

Severity: high
EPSS: 0.6% (p45)
Also known as: GHSA-vp6v-whfm-rv3g
Published: 2024-12-03

References

Related advisories

CVE-2025-30355 — high · PyPI/matrix-synapse
CVE-2024-52815 — high · PyPI/matrix-synapse
CVE-2024-52805 — high · PyPI/matrix-synapse
CVE-2024-37302 — high · PyPI/matrix-synapse
CVE-2026-45078 — medium · PyPI/matrix-synapse
CVE-2026-45076 — medium · PyPI/matrix-synapse
CVE-2025-61672 — medium · PyPI/matrix-synapse
CVE-2024-53867 — medium · PyPI/matrix-synapse

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.