CVE-2023-30609

MEDIUMNVD 5.45.4
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: nvd
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.4Exploit: NoneExposed: 0

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

matrix-react-sdk is a react-based SDK for inserting a Matrix chat/VoIP client into a web page. Prior to version 3.71.0, plain text messages containing HTML tags are rendered as HTML in the search results. To exploit this, an attacker needs to trick a user into searching for a specific message containing an HTML injection payload. No cross-site scripting attack is possible due to the hardcoded content security policy. Version 3.71.0 of the SDK patches over the issue. As a workaround, restarting the client will clear the HTML injection.

CVSS v3
5.4
EG Score
5.4(low)
EPSS
45.4%
KEV
Not listed

Published

April 25, 2023

Last Modified

November 21, 2024

References (6)

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
matrix-react-sdk—3.71.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 45× 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
  2. 2026-07-11 08:25 UTCEPSS rescore
  3. 2026-07-09 19:08 UTCEPSS rescore
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  11. 2026-07-02 16:59 UTCEPSS rescore
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  20. 2026-06-25 13:48 UTCEPSS rescore
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  22. 2026-06-24 17:31 UTCOSV refresh
  23. 2026-06-24 14:03 UTCEPSS rescore
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  25. 2026-06-23 21:31 UTCEPSS rescore
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  1. 2026-06-23 21:31 UTCEPSS rescore
  2. 2026-06-22 14:24 UTCEPSS rescore
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  4. 2026-06-21 14:55 UTCEPSS rescore
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  6. 2026-06-21 01:58 UTCEPSS rescore
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  8. 2026-06-19 19:24 UTCEPSS rescore
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  10. 2026-06-18 17:51 UTCEPSS rescore
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  18. 2026-06-13 22:59 UTCEPSS rescore
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  20. 2026-06-12 23:10 UTCEPSS rescore
  21. 2026-06-11 13:59 UTCEPSS rescore
  22. 2026-06-10 22:17 UTCEPSS rescore
  23. 2026-06-10 13:21 UTCEPSS rescore
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  25. 2026-06-08 14:15 UTCEPSS rescore
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  27. 2026-06-07 19:46 UTCOSV refresh
  28. 2026-06-07 15:23 UTCEPSS rescore
  29. 2026-06-07 15:23 UTCEPSS rescore
  30. 2026-06-06 13:46 UTCEPSS rescore
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  36. 2026-06-04 13:11 UTCEPSS rescore
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  38. 2026-06-02 20:12 UTCEPSS rescore
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  40. 2026-06-02 20:12 UTCEPSS rescore
  41. 2026-06-01 13:51 UTCEPSS rescore
  42. 2026-05-31 22:29 UTCEPSS rescore
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  45. 2026-05-31 00:15 UTCEPSS rescore
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  47. 2026-05-29 13:43 UTCEPSS rescore
  48. 2026-05-28 13:43 UTCEPSS rescore
  49. 2026-05-28 13:43 UTCEPSS rescore
  50. 2026-05-27 13:39 UTCEPSS rescore
  51. 2026-05-27 13:39 UTCEPSS rescore
  52. 2026-05-26 13:43 UTCEPSS rescore
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  54. 2026-05-26 07:18 UTCEPSS rescore
  55. 2026-05-26 07:18 UTCEPSS rescore
  56. 2026-05-26 07:17 UTCEPSS rescore
  57. 2026-05-23 09:43 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-30609?
CVE-2023-30609 is a medium vulnerability published on April 25, 2023. matrix-react-sdk is a react-based SDK for inserting a Matrix chat/VoIP client into a web page. Prior to version 3.71.0, plain text messages containing HTML tags are rendered as HTML in the search results. To exploit this, an attacker needs to trick a user into searching for a specific message…
When was CVE-2023-30609 disclosed?
CVE-2023-30609 was first published in the National Vulnerability Database on April 25, 2023, 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-2023-30609 actively exploited?
CVE-2023-30609 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 45.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-30609?
CVE-2023-30609 has a CVSS v3 base score of 5.4 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2023-30609?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-30609, 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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