CVE-2020-2257

Stored XSS vulnerability in Validating String Parameter Plugin

5.4 MediumFix available

Jenkins Validating String Parameter Plugin 2.4 and earlier does not escape various user-controlled fields, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.73%Up 0.1 points since Apr 14, 2021

What each source reports

NVD Score used 5.4

Record: CVE-2020-2257
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 3.5 LowAV:N/AC:M/Au:S/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-2257
Updated: 2026-11-02

EUVDEUVD-2022-3841 No score

Record: EUVD-2022-3841
Updated: 2026-11-03

GitHub AdvisoriesGHSA-fvwh-wv43-8qj5 8.0

Stored XSS vulnerability in Validating String Parameter Plugin

Validating String Parameter Plugin 2.4 and earlier does not escape regular expressions in tooltips. Additionally, Validating String Parameter Plugin 2.4 does not escape parameter names and parameter descriptions.

This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.

Validating String Parameter Plugin 2.5 escapes regular expressions in tooltips and parameter names. Parameter descriptions are rendered using the configured markup formatter.

Record: GHSA-fvwh-wv43-8qj5
CVSS 3.1: 8.0 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-79
Updated: 2026-11-02

OSV 5.4

Record: CVE-2020-2257
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVGHSA-fvwh-wv43-8qj5 8.0

Stored XSS vulnerability in Validating String Parameter Plugin

This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.

Validating String Parameter Plugin 2.5 escapes regular expressions in tooltips and parameter names. Parameter descriptions are rendered using the configured markup formatter.

Record: GHSA-fvwh-wv43-8qj5
CVSS 3.1: 8.0 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-79
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.jenkins-ci.plugins:validating-string-parameter` Maven	through 2.4	2.5
`org.jenkins-ci.plugins:validating-string-parameter` Maven	before 2.5, plus listed versions 2.02.12.22.32.4	2.5

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-2020-2257 is a medium vulnerability (CVSS 5.4) in Jenkins Validating String Parameter, published September 16, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.73%, the 54th percentile. Fixed in org.jenkins-ci.plugins:validating-string-parameter 2.5.