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Fencer Vulns
low 3.5

CVE-2020-8920 json

Overoptimization leads to private information leak in Gerrit

published 2020-12-10 5 y ago modified 2026-06-17 4 mo ago also GHSA-g5q2-cxgq-h2rw , EUVD-2022-3896

cvss
3.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

An information leak vulnerability exists in Gerrit versions prior to 2.14.22, 2.15.21, 2.16.25, 3.0.15, 3.1.10, 3.2.5 where an overoptimization with the FilteredRepository wrapper skips the verification of access on All-Users repositories, allowing an attacker to get read access to all users' personal information associated with their accounts.

Patch / fix

  • maven com.google.gerrit:gerrit-plugin-api 2.14.22, 2.15.21, 2.16.25, 3.0.15, 3.1.10, 3.2.5
  • Gerrit Gerrit 2.14.22, 2.15.21, 2.16.25, 3.0.15, 3.1.10, 3.2.5

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.5 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 3.5 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 2.7 AV:A/AC:L/Au:S/C:P/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven com.google.gerrit:gerrit-plugin-api
<2.14.22
>=2.15.0, <2.15.21
>=2.16.0, <2.16.25
>=3.0.0, <3.0.15
>=3.1.0, <3.1.10
>=3.2.0, <3.2.5
2.14.22
2.15.21
2.16.25
3.0.15
3.1.10
3.2.5

Affected products

  • Gerrit Gerrit

Classification

Weakness

References

Sources

Fencer Vulns 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.