Skip to content
Fencer Intel
medium 5.2

CVE-2021-20511 json

IBM Security Verify Access Docker 10.0.0 could allow a remote attacker to traverse directories on the system.

published 5y ago modified 4mo ago also EUVD-2021-7929

cvss
5.2
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

IBM Security Verify Access Docker 10.0.0 could allow a remote attacker to traverse directories on the system. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to view arbitrary files on the system. IBM X-Force ID: 198300.

Patch / fix

Is CVE-2021-20511 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.

Check with Fencer

Exploit prediction

1.89% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.2 CVSS:3.0/AC:L/A:N/AV:A/PR:H/UI:N/C:H/S:U/I:L/RC:C/E:U/RL:O
NVD 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CNA 3.0 5.2 CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N
NVD 2.0 6.8 AV:N/AC:L/Au:S/C:C/I:N/A:N

Affected products

  • IBM Security Verify Access Docker

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.