CVE-2024-21630

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.4% (28th percentile of EPSS-scored CVEs). 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
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

Zulip is an open-source team collaboration tool. A vulnerability in version 8.0 is similar to CVE-2023-32677, but applies to multi-use invitations, not single-use invitation links as in the prior CVE. Specifically, it applies when the installation has configured non-admins to be able to invite users and create multi-use invitations, and has also configured only admins to be able to invite users to streams. As in CVE-2023-32677, this does not let users invite new users to arbitrary streams, only to streams that the inviter can already see. Version 8.1 fixes this issue. As a workaround, administrators can limit sending of invitations down to users who also have the permission to add users to streams.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
28th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

January 25, 2024

Last Modified

November 21, 2024

References (10)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 24× 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.

Showing the most recent 100 of 175 total refreshes for this CVE.

  1. 2026-10-09 20:05 UTCEPSS rescore
  2. 2026-10-08 17:07 UTCEPSS rescore
  3. 2026-10-07 23:46 UTCEPSS rescore
  4. 2026-10-06 15:15 UTCEPSS rescore
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  8. 2026-10-01 19:48 UTCEPSS rescore
  9. 2026-09-30 16:56 UTCEG score recompute
  10. 2026-09-30 15:01 UTCEPSS rescore
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  12. 2026-09-28 13:49 UTCEPSS rescore
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  16. 2026-09-22 09:45 UTCOSV refresh
  17. 2026-09-20 20:14 UTCEPSS rescore
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  21. 2026-09-13 16:45 UTCEPSS rescore
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  1. 2026-09-07 15:59 UTCEPSS rescore
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  5. 2026-09-04 05:05 UTCEPSS rescore
  6. 2026-09-03 06:30 UTCOSV refresh
  7. 2026-09-02 14:10 UTCEPSS rescore
  8. 2026-09-01 13:52 UTCEPSS rescore
  9. 2026-08-30 19:15 UTCEPSS rescore
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  11. 2026-08-28 21:39 UTCEPSS rescore
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  20. 2026-08-17 13:45 UTCEPSS rescore
  21. 2026-08-16 19:56 UTCOSV refresh
  22. 2026-08-16 14:54 UTCEPSS rescore
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  24. 2026-08-16 02:12 UTCEPSS rescore
  25. 2026-08-15 01:28 UTCEPSS rescore
  26. 2026-08-13 21:58 UTCEPSS rescore
  27. 2026-08-12 13:49 UTCEPSS rescore
  28. 2026-08-11 13:40 UTCEPSS rescore
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  30. 2026-08-08 16:35 UTCEPSS rescore
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  36. 2026-08-02 02:25 UTCEPSS rescore
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  38. 2026-08-01 14:06 UTCOSV refresh
  39. 2026-08-01 04:14 UTCEPSS rescore
  40. 2026-07-30 16:26 UTCEPSS rescore
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  42. 2026-07-28 15:34 UTCEPSS rescore
  43. 2026-07-27 14:11 UTCEPSS rescore
  44. 2026-07-26 14:53 UTCEPSS rescore
  45. 2026-07-25 14:16 UTCEPSS rescore
  46. 2026-07-24 14:16 UTCEPSS rescore
  47. 2026-07-23 14:17 UTCEPSS rescore
  48. 2026-07-23 14:17 UTCEPSS rescore
  49. 2026-07-23 02:33 UTCEG score recompute
  50. 2026-07-22 23:20 UTCEG score recompute
  51. 2026-07-22 14:07 UTCEPSS rescore
  52. 2026-07-21 15:23 UTCEPSS rescore
  53. 2026-07-21 15:23 UTCEPSS rescore
  54. 2026-07-20 17:06 UTCEPSS rescore
  55. 2026-07-19 02:28 UTCEPSS rescore
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  57. 2026-07-18 10:03 UTCEPSS rescore
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  59. 2026-07-15 16:56 UTCEPSS rescore
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  61. 2026-07-15 01:59 UTCEPSS rescore
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  63. 2026-07-14 21:10 UTCOSV refresh
  64. 2026-07-13 22:28 UTCEPSS rescore
  65. 2026-07-13 06:11 UTCEPSS rescore
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  67. 2026-07-12 05:45 UTCEPSS rescore
  68. 2026-07-11 08:26 UTCEPSS rescore
  69. 2026-07-09 19:09 UTCEPSS rescore
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  71. 2026-07-06 16:26 UTCEPSS rescore
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  74. 2026-07-05 02:29 UTCEPSS rescore
  75. 2026-07-04 06:30 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2024-21630?
CVE-2024-21630 is a medium vulnerability published on January 25, 2024. Zulip is an open-source team collaboration tool. A vulnerability in version 8.0 is similar to CVE-2023-32677, but applies to multi-use invitations, not single-use invitation links as in the prior CVE. Specifically, it applies when the installation has configured non-admins to be able to invite…
When was CVE-2024-21630 disclosed?
CVE-2024-21630 was first published on January 25, 2024, 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-2024-21630 actively exploited?
CVE-2024-21630 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-21630?
CVE-2024-21630 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2024-21630?
The CVE record for CVE-2024-21630 names the fix: "Version 8.1 fixes this issue."

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