CVE-2015-2986: Cross-site scripting (XSS) vulnerability in rakuto.net hitSuji (rktSNS2) 0.2.2b allows remote attackers to inj

Routine

MEDIUM 4.3DOWNGRADE

CVE-2015-2986 is a medium-severity flaw (CVSS 4.3) affecting rktsns2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in rakuto.net hitSuji (rktSNS2) 0.2.2b allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-79
Published	2015-09-05
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: rakuto

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

Am I affected?

Timeline

2015-09-05 17:59 UTCPublished CVE record published
2026-06-17 00:25 UTCUpdated Record last modified

rakuto rktsns2 DOWNGRADE

Affected: 0.2.2b

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.2b

1. Check installed version

apt-cache policy rktsns2 || rpm -q rktsns2 || rktsns2 --version

2. No fixed release: DOWNGRADE to a release before 0.2.2b (Debian / Ubuntu)

apt-cache madison rktsns2 sudo apt install rktsns2=<VERSION_BEFORE_0.2.2b> sudo apt-mark hold rktsns2

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

dnf --showduplicates list rktsns2 sudo dnf downgrade rktsns2-<VERSION_BEFORE_0.2.2b> sudo dnf versionlock add rktsns2

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-2015-2986?

rktsns2: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-2986 being exploited?

CVE-2015-2986 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-2015-2986 affect?

CVE-2015-2986 affects rktsns2. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in rakuto.net hitSuji (rktSNS2) 0.2.2b allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

How urgent is CVE-2015-2986?

Priority 30/100. No elevated risk signals yet.

References

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