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Public proof of conceptFix available

CVE-2021-22557

A public proof of concept exists; no exploitation attested.

  • Published2021-10-04
  • Fixed in2.0.1
  • WeaknessCWE-78 · CWE-94

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

SLO generator allows for loading of YAML files that if crafted in a specific format can allow for code execution within the context of the SLO Generator. We recommend upgrading SLO Generator past https://github.com/google/slo-generator/pull/173

Timeline

dates in UTC
  1. 2021-10-07Exploit-DB entryExploit-DB

Versions per branch

NVD · OSV
Google slo generator
BranchAffectedFixed in
2.0< 2.0.12.0.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Google slo generator to 2.0.1

Advisories and patches

Detection

read 2026-11-09 09:28 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-50385
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.15.3known since 2026-10-23
  • NVDCVSS 3.17.8read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • CNAweakness (CWE)CWE-94known since 2026-10-23
  • NVDweakness (CWE)CWE-78read 2026-10-23
  • FIRST EPSSEPSS score1.6 %2026-11-08
  • Exploit-DBdetectionread 2026-11-09
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2021-10-05

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-10-04
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-j28r-j54m-gpc4

Frequently asked questions

What is CVE-2021-22557?

SLO generator allows for loading of YAML files that if crafted in a specific format can allow for code execution within the context of the SLO Generator. We recommend upgrading SLO Generator past https://github.com/google/slo-generator/pull/173

Is CVE-2021-22557 actively exploited?

Active exploitation of CVE-2021-22557 has not been confirmed. Its EPSS score was 1.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-22557?

CVE-2021-22557 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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