CVE-2021-21677

RCE vulnerability in Jenkins Code Coverage API Plugin

8.8 HighFix available

Jenkins Code Coverage API Plugin 1.4.0 and earlier does not apply Jenkins JEP-200 deserialization protection to Java objects it deserializes from disk, resulting in a remote code execution vulnerability.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.21%Up 0.8 points since Sep 1, 2021

What each source reports

NVD Score used 8.8

Record: CVE-2021-21677
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness: CWE-502
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-21677
Updated: 2026-11-02

EUVDEUVD-2022-2537 No score

Record: EUVD-2022-2537
Updated: 2026-11-03

GitHub AdvisoriesGHSA-58pr-hprx-7hg6 8.8

RCE vulnerability in Jenkins Code Coverage API Plugin

Jenkins Code Coverage API Plugin 1.4.0 and earlier does not apply JEP-200 deserialization protection to Java objects it deserializes from disk.

This results in a remote code execution (RCE) vulnerability exploitable by attackers able to control agent processes.

Jenkins Code Coverage API Plugin 1.4.1 configures its Java object deserialization to only deserialize safe types.

Record: GHSA-58pr-hprx-7hg6
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

OSV 8.8

Record: CVE-2021-21677
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-58pr-hprx-7hg6 8.8

RCE vulnerability in Jenkins Code Coverage API Plugin

Jenkins Code Coverage API Plugin 1.4.0 and earlier does not apply JEP-200 deserialization protection to Java objects it deserializes from disk.

This results in a remote code execution (RCE) vulnerability exploitable by attackers able to control agent processes.

Jenkins Code Coverage API Plugin 1.4.1 configures its Java object deserialization to only deserialize safe types.

Record: GHSA-58pr-hprx-7hg6
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`io.jenkins.plugins:code-coverage-api` Maven	through 1.4.0	1.4.1
`io.jenkins.plugins:code-coverage-api` Maven	before 1.4.1, plus listed versions 1.0.01.0.0-alpha-11.0.0-rc-11.0.11.0.10 Show 23 moreShow less 1.0.111.0.121.0.131.0.21.0.31.0.41.0.51.0.61.0.71.0.81.0.91.1.01.1.11.1.21.1.31.1.41.1.51.1.61.2.01.2.11.3.11.3.21.4.0	1.4.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-21677 is a high vulnerability (CVSS 8.8) in Jenkins Code Coverage Api, published August 31, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.21%, the 82nd percentile. Fixed in io.jenkins.plugins:code-coverage-api 1.4.1.