CVE-2023-32677

LOWNVD 3.13.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This low-severity CVE scores 3.1 under NVD CVSS v3. EPSS exploit probability: 0.6% (46th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated

Also known asEUVD-2023-36918 (ENISA EUVD)Source: ENISA EUVD

3.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 3.1Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Zulip is an open-source team collaboration tool with unique topic-based threading. Zulip administrators can configure Zulip to limit who can add users to streams, and separately to limit who can invite users to the organization. In Zulip Server 6.1 and below, the UI which allows a user to invite a new user also allows them to set the streams that the new user is invited to -- even if the inviting user would not have permissions to add an existing user to streams. While such a configuration is likely rare in practice, the behavior does violate security-related controls. This does not let a user invite new users to streams they cannot see, or would not be able to add users to if they had that general permission. This issue has been addressed in version 6.2. Users are advised to upgrade. Users unable to upgrade may limit sending of invitations down to users who also have the permission to add users to streams.

CVSS v3
3.1
EG Score
3.1LOWmedium confidence
EG Risk
30
EG Risk 30/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity31% × 45%
Impact severity (EG Severity): CVSS 3.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (3.1): severity, escalated by confirmed exploitation. This CVE's 3.1 is its impact severity (EG Severity), not escalated.

EG Severity
3.1 LOWCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 19, 2023

Last Modified

November 21, 2024

References (4)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 36× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 215 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 119 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:39 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  2. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  3. 2026-10-31 16:29 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  4. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  5. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  6. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  7. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  8. 2026-10-26 16:28 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  9. 2026-10-25 17:42 UTCEG score recompute
  10. 2026-10-25 16:29 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-25 09:02 UTCEG score recompute
  12. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  16. 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  17. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  18. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  19. 2026-10-18 08:00 UTCEG score recompute
  20. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  21. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  22. 2026-10-15 16:29 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  23. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  24. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  25. 2026-10-12 18:26 UTCEG score recompute
Show 71 more
  1. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  2. 2026-10-11 21:52 UTCEG score recompute
  3. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  4. 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  5. 2026-10-09 21:55 UTCOSV refresh
  6. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  7. 2026-10-08 17:06 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  8. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  9. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  10. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  11. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  12. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  13. 2026-09-30 16:23 UTCEG score recompute
  14. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  15. 2026-09-29 15:16 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  16. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  17. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  18. 2026-09-26 15:55 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  19. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  20. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  21. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  22. 2026-09-22 14:45 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  23. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  24. 2026-09-20 06:08 UTCOSV refresh
  25. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  26. 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  27. 2026-09-12 14:58 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  28. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  29. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  30. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  31. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  32. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  33. 2026-09-05 15:26 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  34. 2026-09-04 13:58 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  35. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  36. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  37. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  38. 2026-09-01 09:29 UTCOSV refresh
  39. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  40. 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  41. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  42. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  43. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  44. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  45. 2026-08-24 14:14 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  46. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  47. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  48. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  49. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  50. 2026-08-18 13:46 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  51. 2026-08-17 13:45 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  52. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  53. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  54. 2026-08-15 09:07 UTCOSV refresh
  55. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  56. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  57. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  58. 2026-08-11 13:39 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  59. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  60. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  61. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  62. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  63. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  64. 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  65. 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  66. 2026-08-03 10:34 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  67. 2026-08-02 02:25 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  68. 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  69. 2026-07-30 20:51 UTCOSV refresh
  70. 2026-07-30 16:26 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  71. 2026-07-30 01:28 UTCEPSS rescoreEPSS 0.6% · 43rd percentile

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Frequently asked(5)

What is CVE-2023-32677?
CVE-2023-32677 is a low-severity vulnerability; its CVE record was published on May 19, 2023. Zulip is an open-source team collaboration tool with unique topic-based threading. Zulip administrators can configure Zulip to limit who can add users to streams, and separately to limit who can invite users to the organization. In Zulip Server 6.1 and below, the UI which allows a user to invite a…
When was the CVE record for CVE-2023-32677 published?
The CVE record for CVE-2023-32677 was published on May 19, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2023-32677 actively exploited?
CVE-2023-32677 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-32677?
CVE-2023-32677 has a CVSS v3 base score of 3.1 (NVD).
How do I remediate CVE-2023-32677?
The CVE record for CVE-2023-32677 names the fix: "This issue has been addressed in version 6.2."

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