CVE-2020-35734: Sruu.pl in Batflat 1.3.6 allows an authenticated user to perform code injection (and consequently Remote Code

This month

HIGH 7.2DOWNGRADE

CVE-2020-35734 is a high-severity flaw (CVSS 7.2) affecting batflat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sruu.pl in Batflat 1.3.6 allows an authenticated user to perform code injection (and consequently Remote Code Execution) via the input fields of the Users tab. To exploit this, one must login to the administration panel and edit an arbitrary user's data (username, displayed name, etc.). NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	6.8% (top 6%)
CISA exploited list	No
Weakness	CWE-94
Published	2021-02-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: batflat

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

Am I affected?

Timeline

2021-02-15 21:15 UTCPublished CVE record published
2026-06-17 03:14 UTCUpdated Record last modified

batflat batflat DOWNGRADE

Affected: 1.3.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.6

1. Check installed version

apt-cache policy batflat || rpm -q batflat || batflat --version

2. No fixed release: DOWNGRADE to a release before 1.3.6 (Debian / Ubuntu)

apt-cache madison batflat sudo apt install batflat=<VERSION_BEFORE_1.3.6> sudo apt-mark hold batflat

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list batflat sudo dnf downgrade batflat-<VERSION_BEFORE_1.3.6> sudo dnf versionlock add batflat

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-35734?

batflat: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-35734 being exploited?

CVE-2020-35734 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-2020-35734 affect?

CVE-2020-35734 affects batflat. Severity is high (CVSS 7.2). Sruu.pl in Batflat 1.3.6 allows an authenticated user to perform code injection (and consequently Remote Code Execution) via the input fields of the Users tab. To exploit this, one must login to the administration panel and edit an arbitrar

How urgent is CVE-2020-35734?

Priority 54/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

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References

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