{"answers":{"affected":"2 open source packages ship an affected version, including dompdf/dompdf. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-3902 exists.","fix":"Upgrade dompdf/dompdf to 2.0.0 or later.","what":"CVE-2021-3902 is a critical vulnerability in dompdf/dompdf, published on 15 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3902 and fix it if it is affected.\n\nWhat it is: CVE-2021-3902 is a critical vulnerability in dompdf/dompdf, published on 15 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-3902 exists.\n\nAffected packages and fixed versions:\n- dompdf/dompdf (Packagist): affected all versions; fixed in 2.0.0\n- dompdf/dompdf (Packagist): affected all versions; fixed in 2.0.0\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-2021-3902/ (Markdown: https://insights.sbomify.com/CVE-2021-3902/index.md)","id":"CVE-2021-3902","markdown":"https://insights.sbomify.com/CVE-2021-3902/index.md","name":"CVE-2021-3902","record":{"aliases":["DEBIAN-CVE-2021-3902","GHSA-3vjh-xrhf-v9xh"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"PHP PDF library","requires_auth":"none","summary":"Attackers can exploit an XXE flaw in the SVG parser to perform SSRF, disclose internal files, or trigger PHAR deserialization, even with remote features disabled.","user_interaction":"not_required","vuln_class":"xxe"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntr_ai","cpe":[{"product":"dompdf","vendor":"dompdf_project"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-611","name":"Improper Restriction of XML External Entity Reference"}],"description":"An improper restriction of external entities (XXE) vulnerability in dompdf/dompdf's SVG parser allows for Server-Side Request Forgery (SSRF) and deserialization attacks. This issue affects all versions prior to 2.0.0. The vulnerability can be exploited even if the isRemoteEnabled option is set to false. It allows attackers to perform SSRF, disclose internal image files, and cause PHAR deserialization attacks.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Improper Restriction of XML External Entity Reference in dompdf/dompdf","id":"CVE-2021-3902","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xxe","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Heap-based Buffer Overflow in vim/vim","id":"CVE-2021-3903"},"packages":[{"ecosystem":"Packagist","fixed":["2.0.0"],"introduced":["0"],"last_affected":[],"package":"dompdf/dompdf","purl":null,"source":"GHSA-3vjh-xrhf-v9xh"},{"ecosystem":"Packagist","fixed":["2.0.0"],"introduced":["0"],"last_affected":[],"package":"dompdf/dompdf","purl":"pkg:composer/dompdf/dompdf","source":"GHSA-3vjh-xrhf-v9xh"}],"prev":{"headline":"Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii","id":"CVE-2021-3901"},"products":["dompdf/dompdf"],"published":"2024-11-15","related":[{"cvss_score":10,"headline":"URI validation failure on SVG parsing. Bypass of CVE-2023-23924","id":"CVE-2023-24813","kev_date_added":null,"published":"2023-02-07"},{"cvss_score":10,"headline":"URI validation failure on SVG parsing in Dompdf","id":"CVE-2023-23924","kev_date_added":null,"published":"2023-01-31"},{"cvss_score":9.8,"headline":"PHAR Deserialization in dompdf/dompdf","id":"CVE-2021-3838","kev_date_added":null,"published":"2024-11-15"},{"cvss_score":9.8,"headline":"Remote code injection in dompdf/dompdf","id":"CVE-2022-28368","kev_date_added":null,"published":"2022-04-03"},{"cvss_score":8.8,"headline":"DOMPDF Remote Code Execution","id":"CVE-2014-5013","kev_date_added":null,"published":"2020-01-10"},{"cvss_score":7.5,"headline":"Dompdf allows remote file inclusion because URI validation failure does not halt font registration","id":"CVE-2022-41343","kev_date_added":null,"published":"2022-09-25"}],"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":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2024-11-18","vendors":["dompdf"]},"summary":"Attackers can exploit an XXE flaw in the SVG parser to perform SSRF, disclose internal files, or trigger PHAR deserialization, even with remote features disabled.","url":"https://insights.sbomify.com/CVE-2021-3902/"}