CVE-2020-13959

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

5.72% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 92.8% of scored records. A rank, not a probability.

NVD base score

6.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-03-10 08:00Z5 YR AGO

Last updated

2025-02-13 16:27Z1 YR AGO

Reserved

2020-06-08

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

37dca8f4c8bbd9d63304bf332afa0dd7210a984e0315e7abf9f0b83fa8298d30

• lists.apache.orghttps://lists.apache.org/thread.html/r6802a38c3041059e763a1aadd7b37fe95de75408144b5805e29b84e3%40%3Cuser.velocity.apache.org%3Ex_refsource_MISC
• lists.apache.org[velocity-commits] 20210310 [velocity-site] 01/01: CVE announcementhttps://lists.apache.org/thread.html/rb042f3b0090e419cc9f5a3d32cf0baff283ccd6fcb1caea61915d6b6%40%3Ccommits.velocity.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[announce] 20210310 CVE-2020-13959: Velocity Tools XSS Vulnerabilityhttps://lists.apache.org/thread.html/rf9868c564cff7adfd5283563f2309b93b3e496354a211a57503b2f72%40%3Cannounce.apache.org%3Emailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210309 CVE-2020-13959: Velocity Tools XSS Vulnerabilityhttp://www.openwall.com/lists/oss-security/2021/03/10/2mailing-listx_refsource_MLIST
• lists.debian.org[debian-lts-announce] 20210317 [SECURITY] [DLA 2597-1] velocity-tools security updatehttps://lists.debian.org/debian-lts-announce/2021/03/msg00021.htmlmailing-listx_refsource_MLIST
• lists.apache.org[velocity-user] 20210318 Re: CVE-2020-13959: Velocity Tools XSS Vulnerabilityhttps://lists.apache.org/thread.html/r97edad0655770342d2d36620fb1de50b142fcd6c4f5c53dd72ca41d7%40%3Cuser.velocity.apache.org%3Emailing-listx_refsource_MLIST
• security.gentoo.orgGLSA-202107-52https://security.gentoo.org/glsa/202107-52vendor-advisoryx_refsource_GENTOO