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    CVE-2023-53933

    Serendipity 2.4.0 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files with .phar extension. Attackers can upload files with system command payloads to the media upload endpoint and execute arbitrary commands on the server.

    Published:Dec 17, 2025
    Last Modified:Apr 7, 2026
    EPS:Dec 17, 2025
    EPSS Score:0.00592
    CVSS Score:8.8

    Affected Products

    Vendor
    S9y
    Product
    Serendipity

    Exploits

    https://www.exploit-db.com/exploits/51372https://www.vulncheck.com/advisories/serendipity-authenticated-remote-code-execution-via-file-uploadhttps://www.exploit-db.com/exploits/51372

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs

    Related CVEs

    CVE-2026-73629 (CVSS 8.4) — Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipity_url_allowed()…
    CVE-2026-73628 (CVSS 5.3) — Serendipity versions >= 2.3.5 and <= 2.6.0 contain a reflected cross-site scripting vulnerability in the searc…
    CVE-2026-67350 (CVSS 2.1) — Serendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attac…
    CVE-2026-67351 (CVSS 8.7) — Serendipity before 2.6.1 contains an authentication context confusion vulnerability where password validation …
    CVE-2026-39971 (CVSS 7.2) — Serendipity is a PHP-powered weblog engine. In versions 2.6-beta2 and below, the email sending functionality i…
    CVE-2026-39963 (CVSS 6.9) — Serendipity is a PHP-powered weblog engine. In versions 2.6-beta2 and below, the serendipity_setCookie() func…
    CVE-2023-53932 (CVSS 5.1) — Serendipity 2.4.0 contains a stored cross-site scripting vulnerability that allows authenticated users to inje…
    CVE-2024-58282 (CVSS 8.6) — Serendipity 2.5.0 contains a remote code execution vulnerability that allows authenticated administrators to u…
    CVE-2023-31576 (CVSS 8.8) — An arbitrary file upload vulnerability in Serendipity 2.4-beta1 allows attackers to execute arbitrary code via…
    CVE-2020-10964 (CVSS 9.8) — Serendipity before 2.3.4 on Windows allows remote attackers to execute arbitrary code because the filename of …

    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