CVE-2020-25787: An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16

Q: How do I fix CVE-2020-25787?

tiny tiny rss: upgrade to 2020-09-16. Exact commands for each OS are on this page.

Q: Is CVE-2020-25787 being exploited?

CVE-2020-25787 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-25787 affect?

CVE-2020-25787 affects tiny tiny rss. Severity is critical (CVSS 9.8). An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16. It does not validate all URLs before requesting them.

Q: How urgent is CVE-2020-25787?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-25787 is a critical-severity flaw (CVSS 9.8) affecting tiny tiny rss. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16. It does not validate all URLs before requesting them.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	18.4% (top 3%)
CISA exploited list	No
Weakness	CWE-20
Published	2020-09-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tt-rss

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-09-19 21:15 UTCPublished CVE record published
2026-06-17 03:07 UTCUpdated Record last modified

tt-rss tiny tiny rss UPGRADE

Affected: < 2020-09-16

Fixed in: 2020-09-16

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tiny-tiny-rss || rpm -q tiny-tiny-rss || tiny-tiny-rss --version

2. UPGRADE to 2020-09-16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tiny-tiny-rss

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tiny-tiny-rss

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · lis · FIXED · 2.1.21-2.fc46 · FEDORA-2026-039245acc6 · source

sudo dnf upgrade --advisory=FEDORA-2026-039245acc6

Fedora ELN · bitcoin-core · FIXED · 32.1-2.eln159 · FEDORA-2026-41e13beebe · source

sudo dnf upgrade --advisory=FEDORA-2026-41e13beebe

Debian 12 · tt-rss · FIXED · 21~git20210204.b4cbc79+dfsg-1

sudo apt update && sudo apt install --only-upgrade tt-rss dpkg --compare-versions "$(dpkg-query -W -f='${Version}' tt-rss)" ge "21~git20210204.b4cbc79+dfsg-1" && echo PATCHED || echo STILL-VULNERABLE

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: blog.neagaru.com/p/exploiting-tiny-tiny-rss-2020
Exploit-DB: Tiny Tiny RSS - Remote Code Execution

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-25787?

tiny tiny rss: upgrade to 2020-09-16. Exact commands for each OS are on this page.

Is CVE-2020-25787 being exploited?

CVE-2020-25787 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-25787 affect?

CVE-2020-25787 affects tiny tiny rss. Severity is critical (CVSS 9.8). An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16. It does not validate all URLs before requesting them.

How urgent is CVE-2020-25787?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-28373 HIGH 7.5 UPGRADE The auth_internal plugin in Tiny Tiny RSS (aka tt-rss) before 2021-03-12 allows an attacker to log in via the
CVE-2020-25789 MEDIUM 6.1 UPGRADE An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16
CVE-2020-25788 HIGH 8.1 UPGRADE An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16
CVE-2017-16896 CRITICAL 9.8 DOWNGRADE A SQL injection in classes/handler/public.php in the forgotpass component of Tiny Tiny RSS 17.4 exists via the
CVE-2017-1000035 MEDIUM 6.1 MITIGATE Tiny Tiny RSS before 829d478f is vulnerable to XSS window.opener attack

References

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