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CVE-2021-26077: Improper Authentication in Atlassian Connect Spring Boot

8.8

CVSS Score
3.1

Basic Information

EPSS Score
0.59149%
Published
6/16/2021
Updated
2/1/2023
KEV Status
No
Technology
TechnologyJava

Technical Details

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Package NameEcosystemVulnerable VersionsFirst Patched Version
com.atlassian.connect:atlassian-connect-spring-bootmaven>= 1.1.0, < 2.1.32.1.3
com.atlassian.connect:atlassian-connect-spring-bootmaven>= 2.1.4, < 2.1.52.1.5

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from lifecycle endpoints accepting context JWTs. The primary entry points would be: 1) The controller method directly handling installation events (LifecycleController.install), which would appear in stack traces during exploitation. 2) The JWT authentication filter processing all requests, which in vulnerable versions failed to reject context JWTs at lifecycle endpoints. The Confluence documentation explicitly mentions lifecycle endpoint validation regression in 2.1.4, indicating these are core authentication processing functions.

Vulnerable functions

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

WAF Protection Rules

WAF Rule

*rok*n *ut**nti**tion in *tl*ssi*n *onn**t Sprin* *oot (**S*) in v*rsion *.*.* ***or* *.*.* *n* *rom v*rsion *.*.* ***or* *.*.*: *tl*ssi*n *onn**t Sprin* *oot is * J*v* Sprin* *oot p**k*** *or *uil*in* *tl*ssi*n *onn**t *pps. *ut**nti**tion **tw**n *

Reasoning

T** vuln*r**ility st*ms *rom li***y*l* *n*points ****ptin* *ont*xt JWTs. T** prim*ry *ntry points woul* **: *) T** *ontroll*r m*t*o* *ir**tly **n*lin* inst*ll*tion *v*nts (Li***y*l**ontroll*r.inst*ll), w*i** woul* *pp**r in st**k tr***s *urin* *xploi