PT-2021-6888 · Atlassian · Confluence

Amit Laish · Published 2021-06-21 · Updated 2026-01-17 · CVE-2021-26085

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Atlassian Confluence Server versions prior to 7.4.10 Atlassian Confluence Server versions 7.5.0 through 7.12.3

Description The issue allows remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the "/s/" endpoint. This is related to authorization errors. Exploitation of the issue may allow a remote attacker to read arbitrary files.

Recommendations For versions prior to 7.4.10, update to version 7.4.10 or later. For versions 7.5.0 through 7.12.3, update to version 7.12.3 or later. As a temporary workaround, consider restricting access to the "/s/" endpoint until a patch is available.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-425

CWE-862

Related Identifiers

BDU:2022-02440

CVE-2021-26085

Affected Products

Confluence

References · 18

• 🔥 https://github.com/ColdFusionX/CVE-2021-26085 · Exploit
• 🔥 http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html · Exploit
• 🔥 https://exploit-db.com/exploits/50377 · Exploit
• 🔥 https://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html · Exploit
• https://jira.atlassian.com/browse/CONFSERVER-67893 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26085 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26085 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26085 · Security Note
• https://bdu.fstec.ru/vul/2022-02440 · Security Note
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085 · Note
• https://t.me/cvenotify/18518 · Telegram Post
• https://t.me/cveNotify/140167 · Telegram Post
• https://t.me/cibsecurity/26724 · Telegram Post
• https://cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv · Note
• https://t.me/cvenotify/114725 · Telegram Post