CVE-2021-21278
Risk of code injection in RSSHub
RSSHub is an open source, easy to use, and extensible RSS feed generator. In RSSHub before version 7f1c430 (non-semantic versioning) there is a risk of code injection. Some routes use eval or Function constructor, which may be injected by the target site with unsafe code, causing server-side security issues The fix in version 7f1c430 is to temporarily remove the problematic route and added a no-new-func rule to eslint.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Risk of code injection in RSSHub
RSSHub is an open source, easy to use, and extensible RSS feed generator. In RSSHub before version 7f1c430 (non-semantic versioning) there is a risk of code injection. Some routes use eval or Function constructor, which may be injected by the target site with unsafe code, causing server-side security issues The fix in version 7f1c430 is to temporarily remove the problematic route and added a no-new-func rule to eslint.
- Record
CVE-2021-21278- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
EUVDEUVD-2021-2237
RSSHub is an open source, easy to use, and extensible RSS feed generator. In RSSHub before version 7f1c430 (non-semantic versioning) there is a risk of code injection. Some routes use eval or Function constructor, which may be injected by the target site with unsafe code, causing server-side security issues The fix in version 7f1c430 is to temporarily remove the problematic route and added a no-new-func rule to eslint.
- Record
EUVD-2021-2237- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pgjj-866w-fc5c
Risk of code injection
Impact
Some routes use eval or Function constructor, which may be injected by the target site with unsafe code, causing server-side security issues
Patches
Temporarily removed the problematic route and added a no-new-func rule to eslint
Self-built users should upgrade to 7f1c430 and later as soon as possible
Credits
Tencent Woodpecker Security Team
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/DIYgod/RSSHub/issues
- Email us at [email protected]
- Record
GHSA-pgjj-866w-fc5c- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
NVD
RSSHub is an open source, easy to use, and extensible RSS feed generator. In RSSHub before version 7f1c430 (non-semantic versioning) there is a risk of code injection. Some routes use eval or Function constructor, which may be injected by the target site with unsafe code, causing server-side security issues The fix in version 7f1c430 is to temporarily remove the problematic route and added a no-new-func rule to eslint.
- Record
CVE-2021-21278- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-74
- Updated
- 2026-11-02
OSV
RSSHub is an open source, easy to use, and extensible RSS feed generator. In RSSHub before version 7f1c430 (non-semantic versioning) there is a risk of code injection. Some routes use eval or Function constructor, which may be injected by the target site with unsafe code, causing server-side security issues The fix in version 7f1c430 is to temporarily remove the problematic route and added a no-new-func rule to eslint.
- Record
CVE-2021-21278- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-pgjj-866w-fc5c
Risk of code injection
Impact
Some routes use eval or Function constructor, which may be injected by the target site with unsafe code, causing server-side security issues
Patches
Temporarily removed the problematic route and added a no-new-func rule to eslint
Self-built users should upgrade to 7f1c430 and later as soon as possible
Credits
Tencent Woodpecker Security Team
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/DIYgod/RSSHub/issues
- Email us at [email protected]
- Record
GHSA-pgjj-866w-fc5c- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-74
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
rsshubnpm |
through 1.0.0 | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-21278 is a high vulnerability (CVSS 8.6) in Diygod Rsshub, published January 26, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.59%, the 75th percentile. No source names a fixed version.