CVE-2020-15660Public exploitNetwork attack vector

Remote code execution via cross-origin session creation

Published Jul 20, 2021 · Updated Aug 4, 2024

Cross-site request forgery in Mozilla geckodriver before 0.27.0 allows remote attackers to execute commands through a crafted request. The session endpoint accepts cross-origin POST bodies with simple content types, then passes attacker-controlled moz:firefoxOptions binary and args values into process launch. Exploitation requires a browser to submit the request while no WebDriver session is active, and resulting commands run with the geckodriver process privileges.

CVSS severity8.8
High
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Mozilla geckodriver before 0.27.0 allows remote attackers to execute commands through a crafted request. The session endpoint accepts cross-origin POST bodies with simple content types, then passes attacker-controlled moz:firefoxOptions binary and args values into process launch. Exploitation requires a browser to submit the request while no WebDriver session is active, and resulting commands run with the geckodriver process privileges.

The record

CVE
CVE-2020-15660
Published
Jul 20, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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