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CVE-2021-21665: CSRF vulnerability in Jenkins XebiaLabs XL Deploy Plugin allows capturing credentials

8

CVSS Score
3.1

Basic Information

EPSS Score
0.22854%
Published
5/24/2022
Updated
10/27/2023
KEV Status
No
Technology
TechnologyJava

Technical Details

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Package NameEcosystemVulnerable VersionsFirst Patched Version
com.xebialabs.deployit.ci:deployit-pluginmaven<= 10.0.110.0.2

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from a form validation endpoint that 1) accepted GET requests (CSRFable) 2) used insufficient permission checks (Overall/Read instead of Administer). In Jenkins plugins, form validation methods like 'doCheck...' or 'descriptorByName' endpoints are common patterns. The advisory specifically mentions the form validation method was the attack vector, and the fix added POST requirements and Administer permissions. While exact function names aren't provided, this reconstruction matches Jenkins plugin architecture and the vulnerability description.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

* *ross-sit* r*qu*st *or**ry (*SR*) vuln*r**ility in J*nkins X**i*L**s XL **ploy Plu*in **.*.* *n* **rli*r *llows *tt**k*rs to *onn**t to *n *tt**k*r-sp**i*i** URL usin* *tt**k*r-sp**i*i** *r***nti*ls I*s o*t*in** t*rou** *not**r m*t*o*, **pturin* Us

Reasoning

T** vuln*r**ility st*ms *rom * *orm v*li**tion *n*point t**t *) ****pt** **T r*qu*sts (*SR***l*) *) us** insu**i*i*nt p*rmission ****ks (Ov*r*ll/R*** inst*** o* **minist*r). In J*nkins plu*ins, *orm v*li**tion m*t*o*s lik* '*o****k...' or '**s*riptor