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Vulnerability details: VCID-bzxw-4smh-6yed
Vulnerability ID VCID-bzxw-4smh-6yed
Aliases CVE-2025-53890
GHSA-8w3f-4r8f-pf53
Summary pyLoad vulnerable to XSS through insecure CAPTCHA An unsafe JavaScript evaluation vulnerability in pyLoad’s CAPTCHA processing code allows **unauthenticated remote attackers** to execute **arbitrary code** in the client browser and potentially the backend server. Exploitation requires no user interaction or authentication and can result in session hijacking, credential theft, and full system rce.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94 Improper Control of Generation of Code ('Code Injection')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.0107 https://api.first.org/data/v1/epss?cve=CVE-2025-53890
cvssv3.1 9.8 https://github.com/pyload/pyload
generic_textual CRITICAL https://github.com/pyload/pyload
cvssv3.1 9.8 https://github.com/pyload/pyload/commit/909e5c97885237530d1264cfceb5555870eb9546
generic_textual CRITICAL https://github.com/pyload/pyload/commit/909e5c97885237530d1264cfceb5555870eb9546
ssvc Track* https://github.com/pyload/pyload/commit/909e5c97885237530d1264cfceb5555870eb9546
cvssv3.1 9.8 https://github.com/pyload/pyload/pull/4586
generic_textual CRITICAL https://github.com/pyload/pyload/pull/4586
ssvc Track* https://github.com/pyload/pyload/pull/4586
cvssv3.1 9.8 https://github.com/pyload/pyload/security/advisories/GHSA-8w3f-4r8f-pf53
generic_textual CRITICAL https://github.com/pyload/pyload/security/advisories/GHSA-8w3f-4r8f-pf53
ssvc Track* https://github.com/pyload/pyload/security/advisories/GHSA-8w3f-4r8f-pf53
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2025-53890
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2025-53890
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2025-53890
https://github.com/pyload/pyload
https://github.com/pyload/pyload/commit/909e5c97885237530d1264cfceb5555870eb9546
https://github.com/pyload/pyload/pull/4586
CVE-2025-53890 https://nvd.nist.gov/vuln/detail/CVE-2025-53890
GHSA-8w3f-4r8f-pf53 https://github.com/advisories/GHSA-8w3f-4r8f-pf53
GHSA-8w3f-4r8f-pf53 https://github.com/pyload/pyload/security/advisories/GHSA-8w3f-4r8f-pf53
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/pyload/pyload
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/pyload/pyload/commit/909e5c97885237530d1264cfceb5555870eb9546
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2025-07-15T13:24:23Z/ Found at https://github.com/pyload/pyload/commit/909e5c97885237530d1264cfceb5555870eb9546
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/pyload/pyload/pull/4586
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2025-07-15T13:24:23Z/ Found at https://github.com/pyload/pyload/pull/4586
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/pyload/pyload/security/advisories/GHSA-8w3f-4r8f-pf53
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2025-07-15T13:24:23Z/ Found at https://github.com/pyload/pyload/security/advisories/GHSA-8w3f-4r8f-pf53
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2025-53890
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.78103
EPSS Score 0.0107
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:24:23.804391+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/pyload-ng/CVE-2025-53890.yml 38.6.0