CVE-2024-35539: Typecho v1.3.0 was discovered to contain a race condition vulnerability in the post commenting function

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MEDIUM 6.5REMOTEDOWNGRADE

CVE-2024-35539 is a medium-severity flaw (CVSS 6.5) affecting typecho. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Typecho v1.3.0 was discovered to contain a race condition vulnerability in the post commenting function. This vulnerability allows attackers to post several comments before the spam protection checks if the comments are posted too frequently.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-290
Published	2024-08-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: typecho

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

Am I affected?

Timeline

2024-08-19 21:15 UTCPublished CVE record published
2026-06-17 07:34 UTCUpdated Record last modified

typecho typecho DOWNGRADE

Affected: 1.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.3.0 (Debian / Ubuntu)

apt-cache madison typecho sudo apt install typecho=<VERSION_BEFORE_1.3.0> sudo apt-mark hold typecho

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

dnf --showduplicates list typecho sudo dnf downgrade typecho-<VERSION_BEFORE_1.3.0> sudo dnf versionlock add typecho

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.

Public exploits and detection

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

Exploit-DB: Typecho 1.3.0 - Race Condition

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-2024-35539?

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

Is CVE-2024-35539 being exploited?

CVE-2024-35539 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-2024-35539 affect?

CVE-2024-35539 affects typecho. Severity is medium (CVSS 6.5). Typecho v1.3.0 was discovered to contain a race condition vulnerability in the post commenting function. This vulnerability allows attackers to post several comments before the spam protection checks if the comments are posted too frequentl

How urgent is CVE-2024-35539?

Priority 51/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-57369 MEDIUM 6.4 DOWNGRADE Clickjacking vulnerability in typecho v1.2.1.
CVE-2024-46494 MEDIUM 5.4 DOWNGRADE A cross-site scripting (XSS) vulnerability in Typecho v1.2.1 allows attackers to execute arbitrary web scripts
CVE-2024-35540 CRITICAL 9.0 UPGRADE A stored cross-site scripting (XSS) vulnerability in Typecho v1.3.0 allows attackers to execute arbitrary web
CVE-2024-35538 MEDIUM 5.3 DOWNGRADE Typecho v1.3.0 was discovered to contain a Client IP Spoofing vulnerability, which allows attackers to falsify

References

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