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TI-2021-09527 Aliases CVE-2021-28373GHSA-vv4w-hr59-hmw6

The auth_internal plugin in Tiny Tiny RSS (aka tt-rss) before 2021-03-12 allows an…

Priority LOW 35CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-863.

Summary

The auth_internal plugin in Tiny Tiny RSS (aka tt-rss) before 2021-03-12 allows an attacker to log in via the OTP code without a valid password. NOTE: this issue only affected the git master branch for a short time. However, all end users are explicitly directed to use the git master branch in production. Semantic version numbers such as 21.03 appear to exist, but are automatically generated from the year and month. They are not releases.

Why it matters now

EPSS 0.00934 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tt-rss:tiny_tiny_rss:*:*:*:*:*:*:*:*before 2021-03-12VulnerableTt-rss
  • cpe:2.3:a:tt-rss:tiny_tiny_rss:*:*:*:*:*:*:*:* Versions before 2021-03-12 Vulnerable ·Tt-rss

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-28373
  2. 2026-10-03 Alias added: GHSA-vv4w-hr59-hmw6

References

Patch 2

  • TI-2020-15794 An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16. CVSS 3.1CRITICAL 9.8
  • TI-2017-12438 A SQL injection in classes/handler/public.php in the forgotpass component of Tiny Tiny… CVSS 3.0CRITICAL 9.8
  • TI-2020-15795 An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16. CVSS 3.1HIGH 8.1
  • TI-2020-15796 An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16. CVSS 3.1MEDIUM 6.1
  • TI-2017-14381 Tiny Tiny RSS before 829d478f is vulnerable to XSS window.opener attack CVSS 3.0MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences