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    CVE-2022-0217

    It was discovered that an internal Prosody library to load XML based on libexpat does not properly restrict the XML features allowed in parsed XML data. Given suitable attacker input, this results in expansion of recursive entity references from DTDs (CWE-776). In addition, depending on the libexpat version used, it may also allow injections using XML External Entity References (CWE-611).

    Published:Aug 26, 2022
    Last Modified:Nov 21, 2024
    EPS:Aug 26, 2022
    EPSS Score:0.00456
    CVSS Score:7.5

    Affected Products

    Vendor
    Prosody
    Product
    Prosody

    Exploits

    https://prosody.im/security/advisory_20220113/https://prosody.im/security/advisory_20220113/

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-197 Exponential Data Expansion
    CAPEC-221 Data Serialization External Entities Blowup

    Related CVEs

    CVE-2026-43507 (CVSS 5.3) — An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5. A Denial of Service c…
    CVE-2026-43506 (CVSS 5.3) — An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5. A Denial of Service c…
    CVE-2026-43505 (CVSS 6.5) — An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5, when mod_proxy65 is e…
    CVE-2026-43504 (CVSS 6.5) — An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5, when mod_proxy65 is e…
    CVE-2021-37601 (CVSS 7.5) — muc.lib.lua in Prosody 0.11.0 through 0.11.9 allows remote attackers to obtain sensitive information (list of …
    CVE-2021-32921 (CVSS 5.9) — An issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for comparing cert…
    CVE-2021-32920 (CVSS 7.5) — Prosody before 0.11.9 allows Uncontrolled CPU Consumption via a flood of SSL/TLS renegotiation requests.…
    CVE-2021-32919 (CVSS 7.5) — An issue was discovered in Prosody before 0.11.9. The undocumented dialback_without_dialback option in mod_dia…
    CVE-2021-32918 (CVSS 7.5) — An issue was discovered in Prosody before 0.11.9. Default settings are susceptible to remote unauthenticated d…
    CVE-2021-32917 (CVSS 5.3) — An issue was discovered in Prosody before 0.11.9. The proxy65 component allows open access by default, even if…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High