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CVE-2025-66556

Nextcloud talk is a video & audio conferencing app for Nextcloud. Prior to 20.1.8 and 21.1.2, a participant with chat permissions was able to delete poll drafts of other participants within the conversation based on their numeric ID. This vulnerability is fixed in 20.1.8 and 21.1.2.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f849ef2664bd3c3ac90a4f093abb33403fd9135277bb9313f2a7ceca4d7a0e1f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"security-advisories","vendor":"nextcloud","versions":[{"status":"affected","version":"< 20.1.8"},{"status":"affected","version":">= 21.0.0-beta.1, < 21.1.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e46bdc02a6ecd8aec48be9661ea3bfd82500307ea45dd6eefcc509a9f6344dcf · sha256:48f1beab0a8de564… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e46bdc02a6ecd8aec48be9661ea3bfd82500307ea45dd6eefcc509a9f6344dcf · sha256:48f1beab0a8de564… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e46bdc02a6ecd8aec48be9661ea3bfd82500307ea45dd6eefcc509a9f6344dcf · sha256:48f1beab0a8de564… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e46bdc02a6ecd8aec48be9661ea3bfd82500307ea45dd6eefcc509a9f6344dcf · sha256:48f1beab0a8de564… · /containers/cna/references/0
{"name":"https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e46bdc02a6ecd8aec48be9661ea3bfd82500307ea45dd6eefcc509a9f6344dcf · sha256:48f1beab0a8de564… · /containers/cna/references/2
{"name":"https://github.com/nextcloud/spreed/pull/15532","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/spreed/pull/15532"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e46bdc02a6ecd8aec48be9661ea3bfd82500307ea45dd6eefcc509a9f6344dcf · sha256:48f1beab0a8de564… · /containers/cna/references/1
{"name":"https://hackerone.com/reports/3247386","tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/3247386"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e46bdc02a6ecd8aec48be9661ea3bfd82500307ea45dd6eefcc509a9f6344dcf · sha256:48f1beab0a8de564… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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