CVE-2022-41952

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 32% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Synapse before 1.52.0 with URL preview functionality enabled will attempt to generate URL previews for media stream URLs without properly limiting connection time. Connections will only be terminated after max_spider_size (default: 10M) bytes have been downloaded, which can in some cases lead to long-lived connections towards the streaming media server (for instance, Icecast). This can cause excessive traffic and connections toward such servers if their stream URL is, for example, posted to a large room with many Synapse instances with URL preview enabled. Version 1.52.0 implements a timeout mechanism which will terminate URL preview connections after 30 seconds. Since generating URL previews for media streams is not supported and always fails, 1.53.0 additionally implements an allow list for content types for which Synapse will even attempt to generate a URL preview. Upgrade to 1.53.0 to fully resolve the issue. As a workaround, turn off URL preview functionality by setting url_preview_enabled: false in the Synapse configuration file.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
53.1%
KEV
Not listed

Published

November 22, 2022

Last Modified

November 21, 2024

References (10)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
matrix-synapse0.33.5 ... 1.9.1 (235 versions)1.53.0—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:25 UTCEPSS rescore
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  17. 2026-06-28 13:19 UTCOSV refresh
  18. 2026-06-28 04:54 UTCEPSS rescore
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  1. 2026-06-23 21:31 UTCEPSS rescore
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  7. 2026-06-19 19:24 UTCEPSS rescore
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  21. 2026-06-11 00:09 UTCOSV refresh
  22. 2026-06-10 22:17 UTCEPSS rescore
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  40. 2026-05-31 22:29 UTCEPSS rescore
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  44. 2026-05-29 13:43 UTCEPSS rescore
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  47. 2026-05-27 13:39 UTCEPSS rescore
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  52. 2026-05-26 07:17 UTCEPSS rescore
  53. 2026-05-26 07:17 UTCEPSS rescore
  54. 2026-05-26 07:17 UTCEPSS rescore
  55. 2026-05-25 11:41 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2022-41952?
CVE-2022-41952 is a medium vulnerability published on November 22, 2022. Synapse before 1.52.0 with URL preview functionality enabled will attempt to generate URL previews for media stream URLs without properly limiting connection time. Connections will only be terminated after maxspidersize (default: 10M) bytes have been downloaded, which can in some cases lead to…
When was CVE-2022-41952 disclosed?
CVE-2022-41952 was first published in the National Vulnerability Database on November 22, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-41952 actively exploited?
CVE-2022-41952 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-41952?
CVE-2022-41952 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2022-41952?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-41952, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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