CVE-2020-35305

Cross site scripting (XSS) in gollum 5.0 to 5.1.2 via the filename parameter to the 'New Page' dialog.

Published: 2022-07-15 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-35305 is rated Moderate Risk (42.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.30%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-35305

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-07-22 0.42% 0.30% -0.13%
2 2025-07-21 0.34% 0.42% +0.08%
3 2025-07-20 — 0.34% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-35305

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]

Weakness enumeration for CVE-2020-35305

GitHub Security Advisory for CVE-2020-35305

GHSA-fj2w-qmjp-3rjm · Severity: medium · Ecosystem: rubygems — Gollum Cross-site Scripting vulnerability via filename parameter to New Page dialog

Affected software / configurations for CVE-2020-35305

Vendor Product Version Raw CPE
gollum_project gollum >= 5.0.0, <= 5.1.2 cpe:2.3:a:gollum_project:gollum:*:*:*:*:*:*:*:*

References for CVE-2020-35305

URL Tags
http://gollum.com Product
https://github.com/Szarny/ Not Applicable
https://github.com/gollum/ Product Third Party Advisory
https://github.com/gollum/gollum/releases/tag/v5.1.2 Release Notes Third Party Advisory
cvelogic Threat Intelligence