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Fencer Intel
high 7.7

CVE-2020-8154 json

An Insecure direct object reference vulnerability in Nextcloud Server 18.0.2 allowed an attacker to remote wipe devices of other users when…

published 6y ago modified 4mo ago also EUVD-2020-29047

cvss
7.7
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

An Insecure direct object reference vulnerability in Nextcloud Server 18.0.2 allowed an attacker to remote wipe devices of other users when sending a malicious request directly to the endpoint.

Patch / fix

  • nextcloud nextcloud_server 17.0.5, 18.0.3
  • nextcloud Package Hub 15 SP2, Package Hub 15 SP1, Package Hub 12 +2 more 20.0.0-bp152.2.3.1
  • nextcloud openSUSE Leap 15.1 18.0.4-lp151.2.6.1
  • nextcloud Package Hub 15 SP1 18.0.4-bp151.3.9.1
  • nextcloud Package Hub 12 18.0.4-22.1

opensuse advisories openSUSE-SU-2020:1652-1openSUSE-SU-2020:0670-1openSUSE-SU-2020:0668-1openSUSE-SU-2020:0667-1

Is CVE-2020-8154 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-8154 updated

nextcloud: multiple vulnerabilities

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.77% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/819807 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
NVD 2.0 6.8 AV:N/AC:L/Au:S/C:N/I:N/A:C

Affected products

  • n/a Nextcloud Server

Classification

Weakness
  • CWE-639 Authorization Bypass Through User-Controlled Key

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.