{"answers":{"affected":"4 open source packages ship an affected version, including com.atlassian.connect:atlassian-connect-spring-boot. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-26077 in the wild and no public exploit code.","fix":"Upgrade com.atlassian.connect:atlassian-connect-spring-boot to a fixed version for your release line: 2.1.3 or 2.1.5.","what":"CVE-2021-26077 is a critical authentication bypass vulnerability in Atlassian Connect Spring Boot (ACSB), published on 9 May 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-26077 and fix it if it is affected.\n\nWhat it is: CVE-2021-26077 is a critical authentication bypass vulnerability in Atlassian Connect Spring Boot (ACSB), published on 9 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-26077 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- com.atlassian.connect:atlassian-connect-spring-boot (Maven): affected from 1.1.0; fixed in 2.1.3\n- com.atlassian.connect:atlassian-connect-spring-boot (Maven): affected from 1.1.0; fixed in 2.1.3\n- com.atlassian.connect:atlassian-connect-spring-boot (Maven): affected from 2.1.4; fixed in 2.1.5\n- com.atlassian.connect:atlassian-connect-spring-boot (Maven): affected from 2.1.4; fixed in 2.1.5\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-26077/ (Markdown: https://insights.sbomify.com/CVE-2021-26077/index.md)","id":"CVE-2021-26077","markdown":"https://insights.sbomify.com/CVE-2021-26077/index.md","name":"CVE-2021-26077","record":{"aliases":["GHSA-2x7v-w2mv-f3rx"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Atlassian Connect Spring Boot","requires_auth":"low_privilege","summary":"An attacker can bypass authentication in Atlassian Connect Spring Boot by sending context JWTs to lifecycle endpoints, allowing unauthorized re-installation events.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"atlassian","cpe":[{"product":"connect_spring_boot","vendor":"atlassian"}],"cvss":{"score":9.1,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"Broken Authentication in Atlassian Connect Spring Boot (ACSB) in version 1.1.0 before 2.1.3 and from version 2.1.4 before 2.1.5: Atlassian Connect Spring Boot is a Java Spring Boot package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Spring Boot app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Spring Boot versions 1.1.0 before 2.1.3 and versions 2.1.4 before 2.1.5 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send authenticated re-installation events to an app.","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Improper Authentication in Atlassian Connect Spring Boot","id":"CVE-2021-26077","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":4,"n_references":2,"next":{"headline":"Cross-site scripting in Jira Data Center","id":"CVE-2021-26078"},"packages":[{"ecosystem":"Maven","fixed":["2.1.3"],"introduced":["1.1.0"],"last_affected":[],"package":"com.atlassian.connect:atlassian-connect-spring-boot","purl":null,"source":"GHSA-2x7v-w2mv-f3rx"},{"ecosystem":"Maven","fixed":["2.1.3"],"introduced":["1.1.0"],"last_affected":[],"package":"com.atlassian.connect:atlassian-connect-spring-boot","purl":"pkg:maven/com.atlassian.connect/atlassian-connect-spring-boot","source":"GHSA-2x7v-w2mv-f3rx"},{"ecosystem":"Maven","fixed":["2.1.5"],"introduced":["2.1.4"],"last_affected":[],"package":"com.atlassian.connect:atlassian-connect-spring-boot","purl":null,"source":"GHSA-2x7v-w2mv-f3rx"},{"ecosystem":"Maven","fixed":["2.1.5"],"introduced":["2.1.4"],"last_affected":[],"package":"com.atlassian.connect:atlassian-connect-spring-boot","purl":"pkg:maven/com.atlassian.connect/atlassian-connect-spring-boot","source":"GHSA-2x7v-w2mv-f3rx"}],"prev":{"headline":"Information disclosure in Jira Data Center","id":"CVE-2021-26076"},"products":["Atlassian Connect Spring Boot (ACSB)"],"published":"2021-05-09","related":[{"cvss_score":6.5,"headline":"Broken Authentication in Atlassian Connect Spring Boot","id":"CVE-2021-26074","kev_date_added":null,"published":"2021-04-16"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-02-12","vendors":["Atlassian"]},"summary":"An attacker can bypass authentication in Atlassian Connect Spring Boot by sending context JWTs to lifecycle endpoints, allowing unauthorized re-installation events.","url":"https://insights.sbomify.com/CVE-2021-26077/"}