Persistent XSS in markdown parser used by obs-server

published 2020-05-13 6y ago modified 2026-06-17 4mo ago also EUVD-2020-28933

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

A Improper Neutralization of Input During Web Page Generation vulnerability in open-build-service allows remote attackers to store arbitrary JS code to cause XSS. This issue affects: openSUSE open-build-service versions prior to 7cc32c8e2ff7290698e101d9a80a9dc29a5500fb.

Patch / fix

fixed in 1 distros 1

openSUSE open-build-service 7cc32c8e2ff7290698e101d9a80a9dc29a5500fb

open-build-service Debian 12 2.9.4-4

debian advisories DEBIAN-CVE-2020-8020

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Exploit prediction

0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

openSUSE open-build-service

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

bugzilla.suse.com /show_bug.cgi?id=1171439
issue-tracking, vendor-advisory
lists.debian.org /debian-lts-announce/2021/02/msg00006.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2020-8020
NVD CVE-2020-8020

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